I agree with your concerns but I am not sure that it is all or nothing, in the way that encryption security is, for example.
I think that agitprop campaigns are identifiable by the organizations on which they operate, and that site operators should consider that akin to spam and delete it.
Of course I do not advocate an actual firewall. We saw Instagram and the US try to censor the carnage in Gaza, and "allies" like Israel have acknowledged their desire to control the information space to suit their narrative.
Thank you for a real response.