DOS2 made 85 million dollars and that was without the huge brand recognition that D&D 5e, Baldur's Gate, and the Forgotten Realms has. It was a turn based.

Also Larian used Kickstarter to allow themselves to self publish so they could make the game they wanted, which was a turn based game, unlike many if the preDOS1&2 games where they could only get funding for none turn based games. So it's not just money it's a personal preference thing.