I already answered that. Yes you can’t trust a website’s content, that’s why they offer apps. It’s your choice to trust the website which is as secure as they can make it, or you simply use the apps…
Last I checked the apps are mostly just wrappers around WebView, so either way you’re getting served different content randomly without ever knowing. AND, Proton specifically prevents the desktop apps from functioning on unpaid accounts. That would be like Gmail disabling IMAP for unpaid users.
That’s not how electron apps works. When you load a website with your web browser you get served the front and execute it. When you have an electron app, the front is in the source code of the app, and you decide when to update it so you don’t get served unexpected compromised updates. As for the paid service : They don’t sell your data and don’t show you ads so they need money, it’s that simple.
