It is a tool that entrenches current powers that be, system wise. Who decides what the "common" good is? the one in power.

It also hides societal problems and signals that could be used for policymaking.

The acceptance of censorship honestly scares me, and i grew up on stories of oppressive communist regime - full of censorship, secret police etc.

and frankly, commercial censorship might be even worse - it is a "for profit" enterprise, common good be damned.

and one last thing - even if you fully trust your current government, you're just one elections away from something vastly different. They will have access to the same powers that you've granted them(indirectly, by voting).