mmmm Seriously though, if one doesn't trust encryption, then one must stay off the internet. It reads like you dont, in which case Cryptpad wont help you either.
I never wrote that I don't trust encryption. Quite the opposite.
But I don't trust server-side encryption, as offered by many mail services or Nextcloud.
Keys have to be created by me and kept by me. The Incognito Market blackmail should make it clear to everyone how dangerous server-side encryption is. ;-)
In the case of Proton, I would recommend everyone to upload their own GPG pub-keys for the email. Just because of the creation date.