Yes, there are realities and requirements that you must satisfy before you're ready to get a job at that big game company, or to start your own game studio, or whatever your dream is, but if you want it badly enough, then you wont let the nay-sayers tell you what you can and can't do
Look, I agree that toying with beginners is evil, wrong, etc.
Hell, I tend to sit a little closer to the "harsh hand of reality" side of advice than is optimal.
All that said, I tire quickly of the "you can do anything with the right work ethic!" advice that this quote seems to entail and is somewhat common on the forums. This implies that the beginner who's off trying to write World of Warcraft x100 in hand rolled assembly is failing because they're not trying hard enough. This is (to be generous) not helpful to the beginner.
The fact of the matter is that a large number of people can't do it. Worse, a good number of people can't ever do it. I can't be a pro football player. It's no slight on me that I'm not in the top fraction of a percentile of athletic ability. Certainly the criteria to work on a AAA game title are less strict, but the same sort of things apply. There are tons more wildly passionate candidates than there are positions. Passion and persistence alone will never be enough.
The sooner that beginners realize this, the sooner they can see if this path is really the best use of their talents, and if it is then the sooner they can start working on developing the necessary skills.