Perhaps, but as I already noted, every popular video that is demonetized costs YouTube a lot of money because they stream the video to millions of viewers but get no revenue to offset the costs of hosting and streaming. We all know the most important thing to every corporation, including YouTube, is to make as much money as possible, so barring some strong evidence to suggest otherwise, we need no other explanation than the obvious one: advertisers don't want to pay for ads in controversial videos.