With all due respect, no I don’t think it’s selfish. There are many franchises that have gone back to the well too often, to the detriment of the overall experience. I feel the same way about everything after Aliens, Terminator 2, Highlander, Predator, The Matrix, Robocop, Ghostbusters, etc.
I applaud Robert Zemeckis and Bob Gale for not caving into calls for any reboots, remakes, or sequels of “Back to the Future” while they’re alive.
Not sure if serious or making unusually selective XKCD-style memory edit.