Earlier quoted context omitted.
That's precisely why being an older person helps. You have experience under your belt. If you're 55 and have never done anything, that's a strong signal to not invest in you, since you're unlikely to do something now. 20-year-olds are risks. 55-year-old have track records.
Yes. Twenty year olds have unrealized potential. At fifty-five, it is not unfair to call it wasted potential.
I don't know if OP is qualified for YC but I'd hardly call the career he describes a waste.