I agree that apart from https to and from something like a forum/public chat room there is no point in encrypting that space, since it's public. However, one on one chats and VoIP calls I think is a different thing. As long as it is made clear that private DMs and calls aren't encrypted, preferably stated along with all features on the webpage, then it becomes a conscious choice for the consumer/user.

Edit: I did eventually find in the documentation that e2ee is is the pipeline.