ultimately, when the great developers retire, who will replace them? People who strive, and strive hard. His concern is very valid, but really, the game developers who are making stuff now, like Spore in the vid above, have been doing it from the beginning. You can never expect to learn all you need to know while IN college. Most of everything you learn that has some weight is that in job experience, which means if you have to start off programming games that end up in the $5 bin at walmart, so be it. you ae still getting the experience.
So, I say go for it, learn what you can, but, something I am learning harcore right now, life is not easy and WILL NOT be handed to you on a silver plate, You have to make it happen. And that takes work that requires you to lose sleep and mature.