I stand by the idea that Proton is a great option for most people. Having a convenient option like that is exactly what the average person needs in order to stick with their privacy journey, and I believe that those that don't understand or pay attention to privacy tech are those that need it most.
Having said that I much prefer Tuta. The main reason being that they allow for complete anonymity, and proton doesn't. Tuta allows you to sign up while using Tor, so you don't have to trust that they don't log your IP. They also allow payment through Monero or even by mailing them cash. Users have asked Proton for those features for years but they refuse. That doesn't immediately make them a honeypot, but it does mean that they're just not for me.
Trustless and anonymous systems give me more faith than "we're a good company, you can trust us... at least for now". Like I said Proton is great for people that aren't in the weeds of this stuff and just want easy tech that works, but Tuta seems like the better option for more dedicated privacy enjoyers