As far as I can see, Wikipedia actually states the latest state of affairs and the fair use portion. Also, fair use isn't limited to those situations. Specifically, the following points might apply in this case: Pro-tip: Read the whole thing.

What?

I'm showing you games that get lost, and instead of you admitting that console games can get lost if not preserved, your response is just that they weren't important or noteworthy anyway.

I'm pretty sure it's about keeping exclusives, well, exclusive. Also to not deprive companies that make games of the money they earned. Most people who use this emulator to play P5 won't be buying P5. Atlus won't make money off of it, and pirates will make the same old excuse of "I wasn't going to pay for it anyway."

It's really not as much of an issue with older games except for where emulation crosses over with games that are still available for purchase (like VC games and whatnot). It only becomes a real issue if someone is pirating a game that is still for sale.

Satellaview DLC =/= games. Both your listed games already exist. They are just missing the small sections that were on Satellaview. 

The fact of the matter is though that they're still missing. And I don't know about you, but I want to avoid that as much as possible.

Yeah I get it. It's some missing levels and content for Zelda/Harvest Moon. It's a shame that it's gone. But do you see what the argument has turned into? 

"Some obscure DLC, that never hit store shelves, for two existing and preserved games, was lost to the sands of time. Therefore pirating modern console games on PC, as soon as they hit store shelves, is necessary to preserve them for future generations."

Sorry but it doesn't add up. 

Sorry I missed this. Too many replies coming in all at once. 

In that case fair use is so poorly defined that virtually any amount of copyright infringement can be successfully defended as "fair use" in a court of law. 

From your link: Although the courts have considered and ruled upon the fair use doctrine over and over again, no real definition of the concept has ever emerged. Indeed, since the doctrine is an equitable rule of reason, no generally applicable definition is possible, and each case raising the question must be decided on its own facts.

Hey courts is the use of an API fair use? 

Courts: Yes. Wait I mean no. Wait I mean yes. 

Could you define fair use for us?

Courts: Nope! We have no clue what it means. 

Platinum games were all third party multiplats. 

Digital novels are the bread and butter of PC in Japan. 

Most Final Fantasy games didn't come until over a decade after their initial release. 

Guess what? There's already been a Persona game released on PC before