Do protests actually do anything?

Building off this, people have to look at more than just the protests. "Radicals" shape the Overton Window, think Malcom X.

In a world where nobody protests and nobody is participating in radical activism, nothing changes. In a world where there are protests but still no radical activism, there is usually no change, though the media and capitalists will feign care and "listen to the issues". When the protesters become the moderates, the ruling class finally cedes some power to stop social revolution.

In a world where there are only radical activists, no moderate protesters or passive bystanders, there would be social revolution, monumental change. This has happened before, and it's why the ruling class concedes changes as the overton window becomes more radical.

To a lot of people this looks like "protests work!" but it's not the protests primarily, it's the threat of social revolution, led by the radicals and supported by the new moderate position of protesting against the status quo.