Am I the only one that finds it questionable to write this kind of "career advice", when the author clearly has a conflict of interest?

The author is running a business whose main purpose is to sell educational content marketed towards people that want to learn Machine Learning (and claiming you don't need a PhD to do it).

I only have a good impression of fast.ai, but perhaps the author is not in the best position to give career advice on this topic? The author didn't even do a PhD in ML/CS, but in mathematics which arguably less applied/practical.