What you don’t get is:
Given the same conditions, some people have more obstacles put in their way than others.
Saying „I can look after myself“ from a position of privilege is easy.
But taking care of yourself AND removing the obstacles for others so they have the same chance to succeed like you is hard.
And yes: it can make you miserable. Especially when egoistic people keep adding those obstacles again.
A better comparison would be if the old doctor wouldn’t perform the surgery himself, but a team of highly skilled, younger doctors.