Edit. Side note seeing as I don't think I 100% addressed your point. If we allow data to be viewed, and relayed with the potential for altering, then they no longer have 100% control over the content being changed/recorded. So viewing and sharing (with potential edits) is akin to tampering with the pipeline. Sharing is not at issue, it's you being able to intercept and have control over the data on your device.
Now I'll go scurry off and take my tin-foil hat off for the day.
> With messaging inherently you are trying to share with others. If you’re sharing why stop saving?
When sending packages to the Internet you are inherently trying to share with others. If you're sending, why stop receiving?
Except this isn’t the analogous situation.
TLS is more like three people in a room, one of which cannot be removed, and you want to say something to one person without the other person hearing.
Ultimately the person who the message is intended for can do whatever they want with the message.
If all chat communication was public in a single thread I’d agree with you.