Without suckling on your mothers breast you would be dead. Without that 2nd grade teacher you would be dumb. Without the near infinite external inputs that have gone into each person they would not be the person they are, in the place they are. All that is before we get on to the role of plain old luck.
None of your achievements are entirely your own, we are all standing on the shoulders of giants.
Being born in America is winning the lottery in many ways. Should Americans pursue jobs in third world countries to avoid failing to succeed on their own merits?
Shoot, you'd really need to pick the worst job in the worst country as your starting point to know you really had what it takes.
I’d be absolutely affronted, and forever doubting if my achievements were my own or not.