First,
If a Protonmail user emails a Tutanota user, it is NOT end-to-end encrypted.

Therefore,
Your solution of there already exists all these options is bullshit, because the options contradict each other.

Further,
It is unclear why a Nostr user, who promotes Bitcoin, (decentralized social media and money), would be opposed to decentralized email.

Finally,
I reject your entire worldview of having people self-host Bitcoin nodes, which add no value to their lives.
Yet, you dismiss people owning a VPS with their communications, emails, docs, files, ect.

Conclusion,
Given your complete failure to acknowledge basic facts, you're essentially spamming.  To say you're worthless would be an improvement, currently you are sucking up my resources to respond to low level dribble.  So fuck off and let's end this convo