By that logic Nintendo will go after Ubuntu and Fedora too

No it’s not ‘my logic’ the same exact project literally shut down before because of this situation.

The author of the project made the decision to drop the project after Nintendo went after Yuzu/Citra, the latter was in JELOS by default. I assume they felt like distributing Citra put a target on their back and I don't blame them. Not everyone has millions of dollars to give Nintendo.

Neither Ubuntu or Fedora distribute Yuzu/Citra by default and neither platforms exist exclusively for the emulation of Nintendo's systems using what are apparently radioactive emulators. Neither Ubuntu or Fedora advertised that they include Citra, and neither featured screenshots of it prominently along with detailed wiki pages on how to use it.

You can never be sure with those guys

I don't they will dare tbh. I would expect Big Techs to show how dwarf Nintendo is if do an attempt. Big distros do a lot of free work for them.

Ironically enough, maybe the reason why Nintendo is so litigious is because the OG Big Tech (IBM) hit Japan really hard with lawsuits in the early days of the industry.

Well Nintendo was shown the hard way in the 80's that if they didn't protect their IP they would be doomed.