Descartes put it well: "Good sense is, of all things among men, the most equally distributed; for every one thinks himself so abundantly provided with it, that those even who are the most difficult to satisfy in everything else, do not usually desire a larger measure of this quality than they already possess." [1]
Entrepreneurs are no exception.
However, I don't think entrepreneurs have a reputation of being infallibly rational. Scientists are much closer to having that kind of status, so I think studying their irrationality would be more interesting.
[1]: https://www.goodreads.com/quotes/1013067-good-sense-is-of-al...