The NHL game has evolved significantly, and skill development requires specialists - edgework, shooting, stickhandling, defensive positioning / board battles.
Hockey Quebec has been late to react to the changing game unlike Ontario or even out West. Then there is the $$$ involved in finding the specialists, and passing that cost down the food chain, with Quebec region having one of the lowest disposable incomes in the country, it’s just not a viable marriage
GTHL is likely the premier youth hockey league in the world, in a market that can afford it. It’s also why USA hockey has taken off over last 10+ years, there’s lots of $$$$ being poured in & a customer base willing to spend for services
There are two 10 year olds on my sons team, who’s fathers fly them in via private jet for their games - one from Cali, the other from Texas… don’t even get me started on the yearly cost to play