It all depends on your view of evolution and science. Do women orgasm by accident? As a byproduct of fetal development? Or does female orgasm serve a purpose?
Why does one halve of identical twins achieve an easy orgasm, while the other twin is anorgasmic? In theory for a woman, orgasm plays no role in reproduction. You can have 50 kids without ever having an orgasm. The hormones secreted in her brain during orgasm do however make her bond with her sexual partner. The female orgasm probably stems from a time when humans lived off the land and in caves. When women mated at the whim of the most dominant cave man. When mate selection was a matter of survival for her, not a luxury. When how she acted, and how fertile she was, made the difference between dying without children at age 14 or 14, or at age 25 or 30 with genetically healthy kids. Did an orgasm increase her chances of survival? Did it improve her chances of mating with the alfa male? Did it have anything to do with sperm selection to make her fall pregnant with the best genetic man, rather than every man that mated with her?
Since there is no way to know, it is one of the big arguments in science today. And no one side can be proven correct or incorrect. It is all a matter of your viewpoint and logic.
So if I understand your argument correctly, you think that a woman is not entitled to an orgasm? She has to take what she can get from her male partner and not put any pressure on him to satisfy her own needs. She should not even seek sexual orgasm by herself as it would place an undue pressure on her to 'perform'?
This is pretty much representative of thinking in the 1800s up to the 1950s. During this time women had to visit doctors to be treated for 'histeria' (hornyness beyond comprehension). The treatment was that the doctor or his nurse would finger the woman until she orgasmed. This was done for the rich and the poor alike (read 'The History of Orgasm'). It got so bad that vibrators were developed to allow the doctors and nurses to actually treat real sickness. Vibrators were sold as a household appliance like a washing machine, freezer or telephone.
So the ultimate question today consists of two parts:
1) Is a woman entitled to an orgasm, or is she there just for the pleasure of the man, or only for reproduction? Is the only enjoyment she is entitled to her partners enjoyment? Should she be satisfied with intimacy as reward for sex? Or is she entitled to have pleasure in her own right - an orgasm?
2) Who is responsible for her orgasm. Is she just a helpless participant in sex, taking whatever she can get from her partner with her orgasm at his whim? Or is she responsible for her own orgasm with her partner just there to help her achieve it?
Personally I believe that it is somewhere in-between. A woman is responsible for her own orgasm. Just like a man is not going to have sex and if he does not orgasm, roll over, cuddle and live happily ever after. He is responsible for his orgasm and he will go to great lengths to get it. If he does not, he will think something is wrong. The woman's partner is however there to assist the woman to achieve orgasm, either through her direction, plain luck or 'training' by his various partners over time. He cannot know how a woman orgasm. For that reason the woman is responsible to teach and show him. He is responsible for giving it a fair try to make her orgasm the way she wants to. The result is a relationship where BOTH partners are satisfied physically and emotionally. This will in turn lead to a closer relationship, bonding and more and better orgasms for both. This way both partners are equal during sex. One is not more important, or one's needs are not optional or at the whim of the other partner.
Of course I am not saying that a woman should orgasm every time, or that sex should continue until she orgasm. It should be the woman's choice. Sometimes I know I am not going to orgasm, but I still want to satisfy my partner's needs. Sometimes he is happy to just do oral sex on me to satisfy my needs. It is all good and well. When I want to orgasm, I know what to do, and he knows how to help me. And he gets as much enjoyment from making me orgasm as I get from orgasm.
The argument that you make moved on somewhat since the 1990's when the g-spot, female ejaculation, squirting and gushing got popular. It is clear that only some women can do 'it'. Great pressure is however placed on young women to per form for her partner, and there is a perception that ejaculation/squirting/gushing is superior to a 'normal' orgasm. In the process, great pressure are placed on young women to perform and become a member of the exclusive 'club' of women that can. Who knows, in a 1000 years women might have developed through evolution to the point where we can squirt like a fountain. In the mean time, it is probably doing more harm to women's self confidence and sexual well being.
The best part is that this is just my opinion, just like you expressed your opinion. There are no facts to be checked, no scientific evidence that can prove anybody right or wrong. Just many hours of interesting conversations and arguments in classrooms, laboratories and households around the world. Recent science came a long way to study our brain function, nerve function, blood flow, electric activity and many other functions. So we are constantly getting a better picture of how female sexuality and orgasms work. But still now indication on why.