There could be a technology that cryptographically ensures that each letter/character came from a physical keypress/touch from a human when you want to interact with a human online in written form, but then again a robot could also be pressing the physical switches or interacting with a touchscreen. Perhaps this technology could handle copying/pasting too as long as the text originally came from a human.
I hope we'll develop more robust mechanisms for detecting non-human generated content (including text) that aren't only enforceable by law (e.g. labeling AI-generated content in the EU). Apple Reference Image is one of the steps in this direction.
It's kind of like a human moving to a planet with a nitrogen atmosphere. We have to wear a space suit to survive. No matter how much we slim it down, it's still a system on top of our existing systems.
The internet is the same. We have to put a digital suit on our analog meat to explore a digital world that is becoming crowded with evolving digital natives, and those natives are rapidly becoming smarter and better than us in these spaces.