How could you learn anything about what people think of microtransactions from the success of a game that doesn’t have them? If a beloved franchise added a sequel with microtransactions in it and that sequel tanked, then maybe you’d have a case. From the success of Baldur’s Gate 3 the most you could conclude is “people will still buy a game that doesn’t have microtransactions,” which is not particularly revelatory.
A bunch of AAA games that heavily feature microtransactions are smash hits and made millions of dollars. Sure, people complain about it, but they also purchase tons of them (may not be the same people, mind you). I’m pretty sure we can conclude that not all people hate microtransactions. Hell, publishers will look at Baldur’s Gate 3 and probably go “man, this game is good but if they put some paid cosmetics in there they could have made even more money.”