Play BG1 and 2 and come back

And what would that accomplish?
Sure, some background lore/setting stuff - that I mostly know from D&D anyway, although I'm sure there's something I don't know.
Other than that, I imagine I'd spend hours playing a couple games I don't particularly like as they're simply too dated for me, and I personally despise real-time combat in this type of rpg. Personal preference, nothing wrong with it as such.
So please don't take this as a snarky comment, I'm genuinely curious as to what playing those 2 games would accomplish, and in what way it would improve BG3 and change the way I currently view BG3 as well as my feedback?