chadrian, i hope you take this the right way, but you're situation is a little different. you have the chance to go to a firm now, and it's likely that you'll have the same chance 1,2, 5, or 10 years from now.
your profession gives you a lot of open options.
sprayed is talking about an opportunity that, by the nature of his job/profession, may not come up again.
also,
he didn't frame the question as a choice of work less and be happy vs. work more and be unhappy, he framed the question as avoid risk and stay stagnant in career vs take risk and propel career, where propelling career is something that he'd (by the looks of it) like to do...

so imo, euphoricism gave the correct answer when he said grow a pair.