Would you switch careers often? And if so, after how many years for each one?
I don’t think “reversing aging “ would really help like you think it might. It’s not so much that people aren’t strong enough, or capable of switching careers, after a certain age. It’s that it becomes more risky as you settle down.
It’s easy to take risks when you are single and are living modestly. It gets harder if you get married, it gets harder if you own a home, it’s gets even harder if you have kids. Reversing you age isn’t going to lessen these responsibilities, other than waiting it out until your kids are self-sufficient, then you might be more willing to take risk again.