... unless you self-host the server. What you can do with jitsi, but not with zoom.
Unlike Zoom, Jitsi never claimed that their system was e2e encrypted which is a huge difference if you ask me. Apparently its a technical limitation of WebRTC, so I'd assume no webbrowser based solution can be e2e encrypted as of now. Which is ashame since the browser compatability makes meetings with people outside your company (or with less tech savy family members) so much easier.
edit: misunderstoot your point
As your edit already states, not the point I was trying to make, but still, good to clear this up.
There was interesting discussion yesterday by the devs of mediasoup, why it is not in webRTC yet: https://news.ycombinator.com/item?id=22761816