I find that business is opportunistic in general, and those who are successful are generally opportunistic. To constrain oneself and to not take advantage of opportunities likely means your going to get beat by those that do.
not the "This is the right time to start a certain business" kind of way
This fully describes most of the VC-backed startup world. 95+% of the businesses fail and a few get lucky. Part of making that happen is trying just about anything and shooting for the moon.