Position plus depth turns marginal peels profitable — while the 4-bet stays locked at the top.
4-betting narrows to the very top; suited hands with nut potential call more. The question on every street becomes: which hands are happy getting 500bb in?
The big blind 3-bets your early open from out of position — a range that is almost always dense with value.
Assumes a standard 3-bet; 4-bet to ~2.2–2.5x the 3-bet. Deep, favor calls over 4-bets — a 4-bet pot at 500bb+ commits you with range disadvantage.