I guess it speaks more to the idea that there's definitely people out there who look skeptically on a ProtonMail address. There's a lot of people who know what it is and also hold a "If you have nothing to hide, you have nothing to fear" mindset and immediately assume the worst about the person with the ProtonMail address. Because of course, in their minds, if you have such an address, you surely must be unsavory and have things to hide. It's not just autocratic governments who don't like it.