"Covid19 is a lie!1!!" isn't an opinion. It's ignorant non-sense at best, likely malicious, indirect interest-driven misinformation. It absolutely does not deserve the same, attention, platform and range as scientific, or reasonably political debate.

Naive unconditional free speech, "attention communism", if you want lol, is an ignorant and anti-democratic idea. The only reason that hasn't hurt us like this before, was the cost of spreading information effectively, pre-www.