He literally couldn't come up with a single aspect of the game that would actually explain why it is being called "BG3".
And you haven't come up with one why it shouldn't be called BG3.
Huh? I've extensively explained that there is no semblance between Larian's game and the Baldur's Gate series. So, your claim is false. That there isn't a single aspect about Larian's D&D game that explains why it is being called "BG3" IS the reason why it shouldn't be called "BG3".
But other than RTwP, Larian could have done at least something to make it resemble BG
Like what? Once again, please explain what they should have done to make it "resemble" BG aside from RTwP?
Literally anything across all categories of gameplay, environment, tone, visuals.
And I already explained that the RTwP gameplay influences a ton of the rest of the game's design.