Are you being serious?
entirely.
doesn’t have E2EE
how is E2EE at all relevant for a public server?
Matrix is by far more secure than Discord
If your goal is E2EE with one other person, maybe. For public servers, it’s an entirely irrelevant variable.
It is clear that you have never used Matrix before.
I have used it on the privsec server 
In any case can we please lower the hostility a bit?
That security mindset which neglects privacy completely is very terrible.
We don’t neglect privacy completely, but it’s not the scope of the project. There are some changes we make that improve privacy, but they are auxiliary to the project’s goals. What we won’t do is sacrifice security for privacy, and that includes the choice of community discussion platform. 2FA is just one variable too. Discord’s automod is robust by comparison, which is critical for securing a public server against raids/spam/malicious links. GrapheneOS had to disable parts of their bridge for this reason, matrix was unable to prevent that kind of thing and it was getting spilled over into discord by the bridge.
tldr there are historically demonstrated, critical security improvements discord provides over matrix when it comes to providing a public community server. Matrix is better in some areas like one to one conversations with E2EE, but that’s entirely irrelevant for a public server.