Personally, I think it is axiomatic that freedom requires discipline. Absolute free speech (where all and every thing is tolerated) leads to tyranny and loss of freedom.

I consider the parameters that the mods enforce here to be productive and necessary disciplines that keep us free. To discuss Q related things, to engage with each other in mutual solidarity, and for visitors to find and acquire new (and ideally) useful information.

Or in other words, what you said.