I have known precisely zero people who mean “game preservation” when they say “game preservation.”

I have known many people who mean “I want to pirate and emulate games I don’t own” when they say “game preservation.”

If you wanted to actually preserve games, found a museum, hire a curator, create an official institution dedicated to such and staff them with people qualified held to reasonable standards.

You can’t just go “we should preserve games” and then just claim that everyone who pirates and emulates games (theft) is somehow doing some good or noble thing.