I think you massively overestimate how much it affects your success in this field. Maybe if we were in the modeling business or another where looks are critical. But we’re not; your looks are not an indicator of your skills, the actual thing people are judging.
As long as you look presentable, your skills outweigh looks by magnitudes.
And being fit (not to be confused with a hulking mountain of muscle) and in good health is a large part of looks.