I think it's best for the world as a whole that there are some arrogant dilettantes who just bolt for the first door they see without doing proper scholarship. I think most of us use a mixed strategy: pick a main pursuit and try to do it as well as possible, and pick a few side pursuits to idly walk through every so often, looking for low-hanging fruit that somehow everyone else missed. The moral being: indulge your urge to be irrationally contrarian sometimes, but don't let it take over your life.