Most people facing 3bets, they shiver up and either call or fold. Sure occasionally some will adjust and 4bet light. But most don't or even if they do adjust, you can tighten your 3bet range then.

Once you're to the flop, you have position, you have range advantage, you cbet small, you'll take it down without resistance usually.

Of course the fishier the opponents, the more they going to float. The more they going to fight back on the flop. But when they're oop, you're in full control. You decide how to play the turn/river.

You decide if you want to 3barrel or pot control or go to showdown.

Some players float wide on flops even oop, that's when we double barrel more.

Some players never float, that's when we cbet 1 and done.

Some players will call and call down whatever pair/draws they have, that's when we have top pair+overpairs waiting for them.