I think most of us would agree that preservation is important. But it's illegal to acquire, sell or trade stolen property--and that's what happened here. Illegally-acquired ROMS are against the law, yet people continue to dabble in them, and then when they get popped, they complain about it as if their rights are being trampled on. They're not. As a matter of fact, it's the owners of said games who's rights are actually being trampled on.
So ultimately, unless you're talking about (legally) buying the games and creating your own database of them, it's not up to us to preserve anything. It's up to Nintendo, Sony and Microsoft to do that. If they don't want to, then that's on them and there's nothing legal we can do about it.