I don’t think it means their league is any weaker, you see a lot of these kids produce and they’d produce regardless of what league they were in. I think what it really shows (and we already know) is that they have such a small talent pool to pick from that they literally have no choice but to pick up players from other leagues.
Quebec and all the Maritime provinces combined still has roughly 4 million less people then the OHL, and roughly 1 million less than the WHL (not including territories).
While this doesn’t include the American players at their disposal where the Q is practically non-existent. The WHL has had 40 Americans suit up for them this season and the OHL 52, so that just pushes more local players out of spots and too other leagues if they want to keep playing. If the Q had any ability of getting American players to come, which will never happen due to the territory they got, Hockey East has that in a stranglehold, then you’d see way less players from other leagues coming to the Q, I think.
You combine all those factors with the fact that more and more Maritime and Quebec kids it seems are willing to throw their hat into the QMJHL ring and all of a sudden, they’re in even more of a bind because losing a kid to the NCAA in the Q has a bigger impact then losing one if you’re in the OHL/WHL due to the lack of players available to replace them with.
So to answer your question, the reason it doesn’t happen in reverse is 1) they have a smaller population of players to pick from right off the bat, 2) there’s no American presence pushing CHL caliber players out of their respective leagues, 3) the Q is impacted more when a kid goes to the NCAA as they don’t have the numbers to supplement them like other leagues.
It isn’t an issue of the Q being weaker then all the other leagues, they’re producing just as much talent as them, they can play right with them, it really comes down to the fact they have a significantly smaller number of players to pick from and no Americans to supplement their league. If the Q could get the same drawing power as the OHL/WHL and simply had more people to pick from then they wouldn’t have as many out of region players on their roster. In fact, if things were comparable between the 3 leagues then you’d probably see more guys from the Q fall through the cracks and end up infiltrating other leagues but because of all the factors I’ve mentioned, that’s not currently in the cards for the Q.
Don’t however, make the mistake of thinking that the Q has to take players from other leagues because they’re weaker, they have to take players from other leagues due to factors that are really out of their control.
Except they aren't. Just look at the draft. Also, the OHL is the only league that consistently pulls in top Americans.
2018 NHL Draft
WHL: 20 players picked (2 first rounders)
OHL: 35 players picked (7 first rounders)
QMJHL: 23 players picked (4 first rounders)
2017 NHL Draft
WHL: 32 players picked (7 first rounders)
OHL: 42 players picked (5 first rounders)
QMJHL: 14 players picked (2 first rounders)
2016 NHL Draft
WHL: 34 players picked (4 first rounders)
OHL: 48 players picked (9 first rounders)
QMJHL: 14 players picked (2 first rounders)
2015 NHL Draft
WHL: 34 players picked (5 first rounders)
OHL: 31 players picked (7 first rounders)
QMJHL: 30 players picked (5 first rounders)
2014 NHL Draft
WHL: 37 players picked (9 first rounders)
OHL: 41 Players picked (10 first rounders)
QMJHL: 17 players picked (1 first rounders)
2013 NHL Draft
WHL: 33 players picked (8 first rounders)
OHL: 37 players picked (8 first rounders)
QMJHL: 31 players picked (6 first rounders)
I was just going to do the last 5, but didn't want to ignore 2013 which was the best year for the QMJHl in recent years. But, if you look at the disparity between the leagues, when the Q is having a good year, it is close to the other 2 leagues, but it has down peaks dramatically lower than the other 2 leagues (having only 28 players drafted in a 2 year span).
This isn't to say Lafreniere can't be challenged or developed in the Q, or that it is a terrible league. Just that it is of a lower standard top to bottom than the other 2 CHL leagues. I mean, you can blame it on non-regional recruits like Seth Jones. But, the QMJHL has heavily benefitted from imports too. I doubt if you removed Americans and imports from the pools it would dramatically change results. I mean, you take away imports from 2017, the QMJHL had only 10 players picked (Hischier, Chekovich, Koltygin, Gwanke). Some years will just be slightly more noticable than the rest (such as 2016 for the OHL with Juolevi, Tkachuk, Sergachev and Brown taken in the top 15)