Terrible advice. Everything in life is a risk. Chances are you will end up with many boring & comfortable jobs in your life. Sometimes you'll leave by choice, sometimes you won't have any choice at all. I figure everyone owes it to themselves to at least try their dream in life. The key is to be well prepared, pragmatic, time it right and do it before others are relying on you for their well being. Usually the worst outcome is you have to go crawling back to that boring & comfortable job.