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 feel like:
"No villain in D&D is interesting for reasons tied to their species" sounds very dangerously close to "I'm race-blind" in terms of not acknowledging that different people have different struggles, and racism is often a huge part of those struggles.
If you like this idea, you should read the webcomic The Order of the Stick. It's surprisingly good for a comic that started out as DND jokes and stick figures. It deals a lot with the problem of evil in DND.
I think the one you're replying was making the point that you could just swap out "goblins" in that claim with "humans with slightly different features."