That may just be reality. The Disney movies telling everyone they can be princesses may be the cruel ones at the end of the day.
You will not have the same opportunities. Look closely at the ones you have and don't ignore them for sour grapes.
Anything more than "sucks to be you" requires opportunity or real costs and basically no one is willing to do.
Heck even the cases of tutorship are reserved for the lucky talented ones.
that is not analogous to 'suck it up' its calibration. Kelly criterion applied to blackjack for example. Play 5 dollar min bets, 100 max if you have a 30k purse and play perfectly. you wont withstand volatility iver 100 hours.
I hope this clarifies your misunderstanding
"Suck it up" as the ultimate in life advice to those born less lucky lacks a certain something to the more empathetic folks out there.