Just because someone did good things doesn't automatically make the bad things he said or did go away. This is a very dangerous position to hold.
Stallman has an established record going back more than ten years of saying despicable things about women and children and the only reason why this reckoning didn't happen to him until today is because people like the author of this article gave him a pass for philosophical reasons.
She is part of the problem and one of the reasons why women are having such a hard time in the industry today.