when anyone suggests curtailing their political speech

"We should have a day where nobody talks about politics" is less a comment on censorship and more a comment on the speaker likely feeling enervated by the Say Everything Do Nothing cycles of political discourse.

It's naive, self-serving, and myopic, to be sure. But it does illustrate an overall problem of these social forums. People rehashing the same arguments over and over again. People screaming at one another blindly, making all sorts of trollish comments and paranoid accusations, and generally harshing the vibe of the overall community, pleading and begging for annoymous randos to support this or that political candidate or policy... its not fun.

A day without political speech might be healthier for everyone's mental state, broadly speaking. But only for the moment, in the same way a man yanking himself up to the surface of a pool and gasping for air feels relief, before sinking below the surface again.

it’s to create a little feel-good bubble for yourself, which is hardly a worthy justification

When you feel helpless and impotent, its all you know how to ask for. A very sad state of affairs overall. Every day going online, expressing anger, doing nothing about it, logging off, encountering horrors in real world, feeling anxiety, and going back online to vent again.