Ok, fair enough, and I take your point. I think I am reacting to the specific word.
But, leaving that aside - sure, plenty of bad people are good artists. But there's nothing stopping BFI from saying that upfront. Instead they insist they won't comment or judge, which I feel is really out of line. It's saying, they won't judge - therefore, they are valuing this man over his victims. IMO.
If they'd shown the films but acknowledged their maker was really problematic, I would have respect for that.
I think there's huge value in being challenged morally or aesthetically - but I don't see that that is what is happening here. I think what is happening here is simply that some people don't like to accept that a rapist is a rapist, or that someone who makes 'good films' may still be a bad person. That seems to me the opposite of 'challenge'.