If you state your opinion in a room with 3 other people, the chance that at least 1 of those people vehemently disagrees with your opinion are probably low. Especially since people self-select who to congregate with in rooms. If you state your opinion in a virtual "room" with 300 million other people, the chance that at least 1 of those people vehemently disagrees with your opinion is a certainty. Conflict is almost…
Your argument against people becoming hostage negotiators relies, as far as I can tell, on this being an extreme state for humans, and therefore totally unsustainable, but like... why? It's like arguing that bridges can't stand up because they are subject to extreme forces from all sides.
The sanity to which you speak is actually just passivity, In the hostage negotiator analogy, it is what happens when the hostage negotiator hangs up before the negoatiation is over. In the bridge analogy, it is what happens when one of the forces acting on the bridge stops acting on the bridge.
Sustained human existence is work, your proposed sanity preserving option is just nihilism, and it is unsustainable, or at least mutually unsustainable with existence.