They could play a Bach piece at 5, or they write stunning prose, or any of the other remarkable things some kids do that apparently don't fall in your bafflingly narrow definition of "gifted"?

Implying I defined gifted, or even believe that people CAN be gifted.

It seems that you've built your self identification and self esteem on your assumed aptitude in math, which is a problem. The fact that you don't see it only makes it worse.