Because it galvanises those who are only prepared to act when they are assured they won’t be the only few doing so. Snowball effect. It will start a process of millions of people saying enough is enough. Ratio of police to people is at least 200 to 1. The only way they can control a crowd is when only a small numbers turn up. Get millions to turn up and the police will join those millions and the politicians will be ousted or will do a upturn on policy and lockdowns. All of course IMO.