Protonmail has been my main email provider for the past 7 years, and unless its CEO decides to sell it to Trump or Musk I honestly don’t see how his stupid private or not so private opinions are worth the hassle of changing my email for the million things I use my main and all the other emails I registered with Protonmail.
Most rich people have very dubious or outright awful political opinions and unless you’re rich enough to have someone build you an alternative or deconnected enough from society/only exist in programmer circles and are able to live entirely on FOSS software I don’t see why the average user should care about the CEO’s political stance. Maybe that’s my ignorant opinion as a European, but would you stop using Linux if you found out Linus Torvalds secretly loves Windows? Probably not.
I agree that my analogy is fucked up and a little stupid, but I was just applying OPs logic: Andy Yen doesn’t do any more for Proton than Linus Torvalds does for Linux; they’re just stand in figures that people project their love or in this case hate onto. I doubt he personally wrote a single line of code for Proton. In that case Linus Torvalds is actually way more involved with Linux than Andy Yen is with Proton; Andy Yen might have more power over Proton but afaik and like you said Proton is owned in majority by its foundation, which I hope does get a say in what they do.