I am being respectful to educate you, but it's possible this conversation could go downhill if you continue to fail to understand the concept.

Would you agree that a Nostr client is different than inserting your private Nostr key into a web app text box?

If you are capable of understanding this,
Then how do you not grasp that PGP on your end client, is radically different than inserting the PGP private key into a web app text box??

Protonmail is propaganda, changing the definition of end-to-end.  It’s end-to-cloud. 

 You educate me? JFC 
I know what you mean or what you try to say but still there are some things wrong. But we do not have to argue here because it seems to be senseless.
 

 Is proton better than gmail? Yeah
do we need perfect? no.  something is better than nothing

I’m just saying I’m trying to promote decentralization, people on smaller servers doing email.  If proton is encouraging people to only use their app, which doesn’t translate to real clients, it encourages centralization.  Especially if one can't use external PGP with them, unless it's literally copy pasted as text

We all want the same things, just disagree over what’s the best way to do it.  I appreciate your time regardless