Yes but a gamble with benefits. Specifically if you play your cards right and get involved with the right group of people, you get your "ticket punched" which can and does lead to other future opportunities. As much as I would like to side with your belief (and myself use "gamble" many times to describe what people are doing) for a young person who can afford to take a chance (or an older person who doesn't have financial or family concerns) it might be a gamble worth taking.
Think of it as a person who marries a celebrity fully knowing that the relationship might not work out. They get to attend parties, they meet "important" people, they move in the right circles they get their picture in the press. The relationship breaks up. Are they better off than the same person who is living in the middle of nowhere and has the same experience? I'd say they are exposed to things that give them much more opportunity to land on their feet.
Or as another example someone who pursues a dream to win a gold medal at the Olympics and doesn't even get a bronze. I'd say it's an experience worth doing, in general of course.