you live only once, do the scariest/craziest thing
In fact, it's even worse than that: what you find interesting is not necessarily something that the average web surfer could even understand.
Of course, academia has its own problems (e.g., your peers don't really care much about your success and have their own agendas, which causes problems with peer review). Also, publishing stuff isn't really anywhere near as rewarding as having a successful web startup.