Also few adds:
Think of the cases for example he has (AK, QQ+) 4bet range:
AK in 4bet, we Shove -> he folds, lost a lot value.
AK in 4bet, we Call -> he might still CBet, we earn money, he might hit, we earn again money. And he wont really hit that often to make our Call mistake.
AK conclusion -> we earn a lot more money if we just Call and let him hit.
Equity Win Tie Loss Hand
Player 1: 91,844% 91,193% 1,301% 7,506% AA
Player 2: 8,156% 7,506% 1,301% 91,193% AKs, AKo
I would never be scared to Call with such equity against him. If he hits, then lucky him.
QQ in 4bet, we Shove -> he folds, lost a lot value.
QQ in 4bet, we Call -> he easily go broke with that hand postflop, we get a lot value from him. And also he wont hit that often against us.
Equity Win Tie Loss Hand
Player 1: 81,547% 81,330% 0,434% 18,236% AA
Player 2: 18,453% 18,236% 0,434% 81,330% QQ
Either I wouldn't be scared of such Call against QQ, he wouldn't hit that often.
KK in 4bet, we Shove -> he might Call maybe even fold, lost a lot value.
KK in 4bet, we Call -> he easily go broke with that hand postflop, we get a lot value from him. And also he wont hit that often against us.
Equity Win Tie Loss Hand
Player 1: 81,946% 81,715% 0,463% 17,823% AA
Player 2: 18,054% 17,823% 0,463% 81,715% KK
Read about QQ.
Conclusion? I think I don't have to write it even, and pretty sure you see the difference. You lost a lot value.