Bedrockgames
I post in the voice of Christopher Walken
I personally doubt it's as machiavellian as that. It's more like he made a casual comment re: Dark Sun and we're the ones who are more concerned about, in part because some of us (like me) thought Dark Sun was both fixable (by removing and replacing slavery, Muls, etc) and inevitable. That said I do think the not choosing Dark Sun was about more than slavery - which could be removed - I think two of the "controversial issues" that got it canned was that it's about man-made climate change and massive societal inequalities, which are RL issues - and could not be removed.
It is pure speculation and intuition on my part. I could certainly be incorrect. I also think you could very well be right about the climate change element. I was basing this on the way they used these issues to justify the OGL thing. It is equally possible this was just an off the cuff remark about dark sun (but I could see it being talking points they want him to go back to in the wake of the OGL issue (which was catastrophic for them PR wise when it happened)