It only really makes sense when the remaster is trash

I gotta disagree. Even when the remaster is (arguably) better than the original, there's a lot of value in the original art assets and the more rudimentary gameplay as a historical guidestone. For the same reason you wouldn't tear up the original Mona Lisa because we've got a high resolution digital copy, you don't just scrub copies of the original version of Pong from the internet because we have Wii Tennis.