Falling Icicle
Adventurer
Except we're not talking about the spells within the school of necromancy... we're talking about the specific spell Animate Dead (with its 'non-good' descriptor). I don't think anyone here is advocating putting that tag on every spell within that school.
Umbran was, unless I misunderstood him.
Now as D&D 'Adventurers', have we traditionally laughed in the face of those social mores? Absolutely. As has been pointed out... looting the body of the creature we just killed, or invading the tomb to steal its riches. But quite honestly, that's more a fault of us as players and DMs over the last 40 years allowing those actions to become so commonplace that they now appear to be "neutral"... when in truth, they probably could/should/would be looked upon with the same horror that we attribute to people who raise the walking dead.
From what I have heard, killing things and taking their stuff has been a major part of D&D since the very beginning.
But I also think it does add to the game to have a spell of this sort maintain a genre consistency to pretty much all stories within this genre that says animating the dead just is socially reprehensible. Yes... I know and agree that the Dominate spells can be just as evil depending on how they are used, and that Fireballs can cause just as much (if not more) outward destruction... but the fantasy genre has never made hay on their uses for evil purposes. There's no entire strains of the genre within fiction wherein the stories are all about fireballing people or dominating people.
I can think of plenty of stories involving evil people using mind control. Sarumon in the Lord of the Rings controlling the king of Rohan is one example.
And let's not kid ourselves... why do so many players want to play the "Good Necromancers" in the first place? It's exactly because Necromancers have always been evil, and thus players want to be unique by being the one character in the story doing the opposite. "The One Good Necromancer in the land." Well, in order for that to have any meaning... you need necromancers to be evil, otherwise, being a Good Necromancer ain't no big deal. They'll become as overwrought and overdone as vampires currently are in popular genre culture. And do any of us really want that?
Yes. Being popular isn't a good reason to deny something. I could say that typical DnD fighters and wizards are overwrought and overdone, but I wouldn't ever try to deny the ability to play one for that reason. If popular culture will help bring more new players to the hobby, I say more power to it.