I've spent about 1000 hrs on bg1/2 enchanced edition and i dont really know what DnD is... and i dont care... I want another baldurs gate game. Whether you like it or not being something else then bg1/2 is not gonna make it as succesfull.
Then you need to take this up with WOTC because video game developers are not allowed to use older rulesets than the most current.
Lots of people including me have wanted a new Baldurs Gate game using the same ruleset and features of the first two games ever since BG2, but those who have realized how it works know that this can never happen due to how the licensing for DnD games works.
In contrast I find it funny yet odd as to how Idle Champions ever got officially licensed as a valid DnD game when it features absolutely nothing to do with any of the DnD rulesets and is just an idle clicker with a morally repugnant cash grab shop.
I can tell you with a 100% certainty that ever since BG2, I have been the sole individual and only person actively asking for newer games to be made with the same ruleset and features, maybe with the new prestige classes added on top, across every DnD video game related fan site, and every other person disagrees with this and wants new games to be made using the latest rulesets only, which is exactly why that is what ends up happening.
If you disagree with this, its too little too late. You already had plenty of time since BG2 to communicate your desires for BG3 across a multitude of forums, and you never did until now. They already have listened to the fans for well over a decade and implemented what the vast majority have asked for over a very long period of time. While I am sure there are plenty of people that wanted the same thing that I initially did, none of them bothered to put their feedback where it could have mattered other than just whinging on any old gaming forum that 'they don't make games like they used to!'.
BG3 absolutely will sell, and likely much more than BG1&2 did because they have implemented what most DnD fans and PC gamers want, as opposed to trying to appeal to a tiny niche of players like me and you who just wanted more games just like BG1&2.