The only thing it is the biggest misconception to think that CRPG = niche (even before). CRPG was never niche, the indutry lacked good CRPG games, it is that simple.
CRPG's were niche.
We never lacked good CRPGs.
BG1, BG2, NWN, NWN2, PoE, PoE2, Kingmaker, Wrath of the Righteous, Temple of Elemental Evil, Tyranny, KotoR, KotoR 2 etc.
The genre simply never had a large audience. It was niche. It is that simple.
thanks God we have Swen and the team who are really passionate about what they are doing
And yet, they've gone on record for stating they have little interest in BG/D&D. Also their Divinity titles, including the CRPG's of DoS 1 + 2, are nowhere near as popular as BG3.
If it was simply "Larian is the only studio that can make a CRPG" then they'd be having similar success prior to obtaining the popular IP they don't really care for.