I see your point, but one could argue that showing your IP to peers (your chat contacts) isnt such a big deal. Or even to all the peers, as long as the content is encrypted.
I tried session a few times, but often had connectivity issues. The deal breaker with session right now is the group functionality, you can't generate an invite link, you can only add people manually - which sucks for onboarding. There are communities, but someone has to host a server and that part is a bit more complex and if I understand correctly the community runs over https directly to the person hosting it, bypassing the relay network ( I might be wrong on this?)