I thought this when I first read the article a few hours ago and decided to wait to see if anyone else posted (they haven't, so I may be wildly off with this) but "You must be entrepreneurial" sticks out to me as a mostly redundant combination of the preceding points. I wonder if the piece would be better or worse if that paragraph were replaced with a shorter one titled "Run Your Own Business" (IMO that would be even more out of place, but make the point more clearly), or simply removed altogether.

Taking on board what people have commented in this thread, I think it ought to be replaced with "insert your passion here". He has chosen entrepreneurship because that's his thing, but it seems to me idiosyncratic.