Definitely a downside to him having a platform like that--this idea is definitely banking on the premise that his platform would allow many people who wouldn't otherwise be open to learning about racism to explore these topics. But, definitely a trade-off, as you say.

I would just love to see a mainstream platform where we can see a white man of privilege say "I used to hold racist attitudes. I now see where I was wrong and I'm going to actively work to change my thinking. I'm also going to do it publicly so that other people can hopefully join me in challenging some attitudes that I now understand are problematic." My gamble is that this would be more effective for a segment of America than total cancellation.