I agree on all of those except 2 and I think I soft disagree on 6 / think it's more complex.
My knowleldge of how significant GAZ10 is not there (I wasn't around for it, I have not done that research) and the more popular a piece is the more harm it can cause. However, to me, that isn't a relevant point - a harmful work is a harmful work, and random crap can suddenly receive attention because of anything. I think dealing with any wrong is a commendable thing, even if I would agree a wider conversation is needed.
I can see WoTC being lazy and stop selling some material but I can see them being less lazy depending on how the company changes over time. I think the naughty word that happened with Spelljammer may have hopefully been a proper turning point and that they can see the value medium and long term to taking the effort to just, say, donating further proceeds to chairty and working with the community to identify harmful hateful content in past books (because a lot of this information is out there and documented).
I don't know. I am pretty cynical about WoTC but I can see them taking positive action on something like this - especially since just taking them down would prompt a further backlash.