Plenty of arguments to be made for and against. Taking a semi-auto pistol round and shooting it in a revolver is a bit of an oddity but certainly, we do it. Actually trying to re-invent the round by making AutoRim brass is taking it to the extreme. This is merely my opinion, but my reasoning is...

The .45 AR exists because of the evolution of the .45 ACP revolver. It was piles of surplus revolvers that hatched the idea for this oddball brass in the first place. And the revolvers really only came to exist in the first place because of extreme wartime demand.

.45 AR brass is miles from normal, average brass. It's the oddest weighted, thick headedest stuff ever, because it is doing an oddball Rube Goldberg kind of job.

It exists because of war demands and piles of surplus guns and surplus ammo that ran out.