Nobody gets taught to lose, that's a myth, or teams wouldn't suddenly turn it around (because all their players were ruined from years of losing).
Young players can be taught they don't need fundamentals if they repeat mistakes without repercussions, that's how Edmonton ruined a lot of talented players.
The question isn't how many young players, but which young players, and how NHL ready they are. I expect Lindblom and MV to be up this year, because they're not far away and MV is older. Vorobyev may wait to next year because he's less experienced and needs a full season. NAK needs more time (according to Magua). Morin could play now but a little more polish won't hurt him.
Players who are extremely talented can get by with their talent while they learn, but lesser talents need to master the fundamentals of the game to be effective at higher levels. Some players have high hockey IQ and pick up the pro game quickly, others need lots of reps.
Hextall brought up a lot of young players this year, but other than Patrick and Sanheim, none are difference makers (nor is Morin). Lindblom is the only other prospect who could have a significant effect on this team this year.