It's a matter of phrasing things. Moxie had this illustrative take: If your chat is not e2ee, it'a a group chat. It's you, your mom, every secret service in the world and some ISP employees as well. If we could clarify to our social circles and broader society that every non-e2ee chat can be browsed by some overpaid freckled 20-something borded out of his mind at a FAANG or an ISP then the viewpoint could change.
Maybe one of the most helpful parallels is with mail. I think US and other countries have strict laws about mail communication privacy. Someone can in theory open your mail but it's strictly regulated and not done in a total way.
Also I do think talking about future malicious government prosecuting people based on what was collected previously is actually a good one. But just talking about privacy may be a little too vague.
For many people the state is inefficient, illogical, evil and goes after them without any reason (ex: think COVID restrictions). Then why do you care about another way to label you, if you think they already do it, but randomly.
I feel that the privacy discussions do not acknowledge at all there are many other structural society issues. Sure it would make an evil-intelligent government have a harder time, but will not improve at all life with an evil-idiot government, and to me it seems those are a bit more prevalent (note: idiot = implementing solutions that will not solve the problems they claim they do, while them honestly thinking they do solve them)
And that is an argument for agreeing to give more ways to go after you to that supposedly evil government?
I'd understand if people have high trust in government and argued "Yeah it could be misused, but I trust the government not to do that". That still misses the part that governments can change, but at least it's somewhat consistent.