That argument makes sense for a novelist, say, or a stand-up comic, or anyone who's basically a solo act. But a movie starring Actor X is not Actor X's work. Actor X is just one of the hundreds of people the filmmakers hired to do their work. And it hardly seems fair to penalize those hundreds of other people because you don't like just one guy.
Besides, many great works of entertainment have been the creations of awful people. Alfred Hitchcock was horribly abusive to his actresses. Julius Schwartz, probably the most important editor of DC Comics' Silver and Bronze Ages, was a serial sexual harasser. Gene Roddenberry probably was too. If we throw out every creation by a creator who was a jerk in real life, we'd have to throw out a huge percentage of our most acclaimed popular entertainment.
So it's important to separate the creation from the creator. You wouldn't blame a child for the sins of their parents, so a brainchild shouldn't be blamed for its creators' sins either, except in cases where it actively promotes their harmful values, like Birth of a Nation, say. The same person can be responsible for both good things and bad things in the course of their life, because people are complicated. Celebrating the good they did is not endorsing the bad.