Sadly, most people really don't care, or aren't as aware, and cerebral as that.
I believe that it takes certain personality types to become anxious and have constant negative patterns.
If you really think about it, the environment we live in, the things we see and are taught, and the sad realities of life all contribute to our anxious state.
Basically, you're anxious for a good reason. You're not crazy. Life is just very hard, if you look at it from a smarter perspective, and anxiety develops as a result of the unscertainties. What are we here for? Am I going to get a heart attack out of the blue and die eventually, etc etc. Because your mind knows that those are all possibilities, its like we intuitively know that we can drop dead from a heart attack, its possible, we also know that there are no concrete answers about life.
All these things contribute to anxiety. The more you think about it, subconsciously or unconsciously, the more it contributes to anxiety. If you're the competitive type, or the type that wants all a's, or what not, even if you choose not to be, but if your natural state is like that, it will contribute to anxiety.
Then when you're overhwlemed for whatever reason, anxiety attacks and physical sensations kick in.
It sucks, but its all logical if you think about it. It doesnt come from nowhere.
So basically saying, its a hard battle, and the smarter you are the more prone you are to these things.