Every time people lament changes to the lore that amount to “not every member of species X is irredeemably evil” and claim the game is removing villains from it, I think how villains of so-caleld evil species fall into two cathegories: a) bland and boring and b)have something else, unrelated to their species going on for them, that makes them interesting.
I prefer the culture model significantly. Yes most orcs you meet will be part of a warband, but you may also get the orcish equivalent to Kublai Kahn. Drow have a cruel backstabbing matriarchy, but some surface city drow families only reflect that in that women are default head of household. You aren’t killing that camp of goblins because they’re short and green you’re killing them because they’re bandits, hell you may have been given that quest by a goblin.
And it lets you play with stereotypes vs cultural identities being lost to assimilation.
And it’s not like you can’t just automatically signal evil. Drow assassins probably aren’t up to any good unless you’ve been given a heads up. A goblin or orc raiding party is a raiding party and those are safe to assume are evil even if it’s an aasimar one. Even benevolent illithid eat brains.
And we have an example of this in the gith. The difference between the two types is cultural not biological.