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.
Likewise, Goblins.
Your number 2 is based around cultural, not species differences. Two humans raised in two different cultures could end up very different.
There could be two tribes of goblins. One that began eating people out of desperation and now just do it because it's tradition. The other could have grown up in close relationships with their nongoblin neighbors and are seen as a valuable part of their region.
So untying evilness to their race isn't being race blind or pretending people down have struggles - it's removing the shoehorning that occurred.
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."