[dvh1990]

I think it's perfectly fine to say "I'm happy where I am, I don't want more".

But that's not the OPs sentiment. I think that deep inside OP feels entitled to higher achievements than they have been able to reach, and are resentful of the fact that life hasn't been unfolding properly for a person of their talent.

To that I say, how long are you going to nurse your ambition without getting up and doing something about it?

[bladegash]

I think ambition is motivated by a variety of things, one of which, is by comparing oneself (or having others compare them) to the accomplishments of others. While OP is pretty critical of themselves, they’re also reflecting and asking for feedback. Sounds like they would like to be more ambitious, but need some self-confidence.

To your point, I agree with you that advice like “be true to who you are, don’t change” may be the exact type of advice to where someone would be content with where they are, instead of striving to grow and try something new.