I think this goes directly to the "if you use these platforms you are a fool" comment. It seems to me that some people who aren't fools use the platforms, and some who are, don't.
Also, this is HN. Pretty sure there is more than one MIT PhD reading this, and I know there is more than one doing original AI research. Bring this comment to mind: https://twitter.com/paulg/status/28911860225 (exact comment here: https://news.ycombinator.com/item?id=35079)