In that case don't use Tiktok dm's to discuss your sexuality. I think it is strange that people feel like they have to be able to talk on sensitive topics over every interface they can get their hands on.

Similarly in "traditional" media you may not want to discuss such private conversation on a radio broadcast. Perhaps you would rather discuss it on the phone or over snail mail as there is more of an expectation of privacy on those medium.

This is fine if you have TLS encryption and the platform is not local.

Sure, they can fabricate some evidence and get access to your messages, in which case, valid point.