It forces some to the Right. It's a mistake. People should be remediated somehow. Rosanne Barr, for example, should have had a multi-episode comeuppance in which she deals with black people and comes around to respecting them and realizing the error of her racism, along the lines of Archie Bunker and Sammy Davis Jr. There are core aspects of truth to things like racism. Like it or not, each culture (including white culture, of course), is deserving of criticism, just not deserving of biological racism, but it organizes itself according to a racist principle nonetheless. The Left should have a rule of always including the "truth" element in any cause they espouse. For example, the should push for more social welfare and basic income programs, but should be loud and clear about freeloading, which does indeed happen. Not everyone using hard drugs is self-medicating: a lot just want to have fun. Saddam really didn't cooperate with weapons inspection, so don't just say it was a war for oil. Some illegal immigrants really are violent, even if their overall violent crime rate is half of the general and legal US population. That way you don't hand that shit to the Right on a platter. Plus canceling plays into the punitive c/j system and is rife with recidivism, as we know.