The problem with the original games, is that they haven't aged too well. In terms of gameplay, graphics, voice acting etc.
The older games just aren't as accessible as the newer games and I think that's why they do the remakes, to capture that audience that can't be bothered to play the original games.
And the sad truth is that RE has to adapt with the times. It can't forever be the RE we know. It's going to probably get weirder, go into uncharted territory with multiple spinoffs and more. When I hear RE, I think endless possibilities. It doesn't have to be a zombie virus for example, it could be vampires, lycans again, etc. Didn't the last one technically have witches?
Idk, I'm probably going on a tangent now, so I'll shut up.