It's a bad comment because it totally misses the actual dynamics of the creative marketplace--that is, superstars-take-all. It has nothing to do with the "fun" of the work. The superstars in the creative industries are making 7-8 figures and everyone else is making 4-5 figures while trying to become a superstar.
And I would say that going into a field that requires hitting the jackpot to not be waiting tables as a day job isn't a great strategy from an expected earnings perspective. (Which isn't to say people shouldn't do it if that's their thing.)