Originally Posted by Paul Valente
I think the assymetry of the ranges is the main reason. Even a BTN steal range is much stronger than a BB defend range.
Tbh I don't think it's much stronger, today btn steals are easily in the 55-60%ish range while people fold 35-40% of their BB vs a btn steal which means they are playing top 60-65%. Even top 55% vs top 65% is only about an 52-48 % favorite equity wise. What the main reason is, idk to be honest, but if I had to guess, it's the positional disadvantage which you can't really ovecome. Many flops are very hard to peel oop even if you have the best hand with your Ahi and Khi at the moment, and especially knowing you are gonna be facing lots of double and triple barrels.
So it's quite possible that even though you are being exploited by folding more than 18%, you could be exploited much harder if you were peeling too light and button can use his position to push you off your weak sd value on many cards later on after having invested more money, or he can decide to give up when you are obviously ahead and not folding, or draw free or whatever helps him more.
Or maybe the answer is something else, idk. Maybe if LHE was solved, bots could fold only 18% and not get exploited, who knows.