Which statement is not factual?
Most high draft picks who are brought into the NHL ending up sticking and not regressing badly.
Professionals who run the teams get things right more often than wrong. That includes BOTH when they graduate a player fast AND when they do so more slowly.
Lets take a look.
Starting with 2019, because the others are too young and 2020 was affected by COVID.
Hughes, Dach, Kakko, Heinola were rushed, only Hughes, a special player turned out good, Dach is still up in the air but will likely never reach his true potential.
2018, All top 5 picks were in the NHL the very next year, Tkachuk and Svechnikov were both special players on NHL readiness and Dahlin was too, these guys did not need development, they were good off the bat. Kotkaniemi and Zadina did not have that luck, they busted. More improtantly, these three guys were trusted in key roles and into positions where their career would play out, the latter did not. An overwhelming majority of players that were not drafted in the 15-20 next picks panned out.
2017 is a poster year to make you look like a fool. Only Hischier and Andersson played right away, and Lias was given the typical up-down 4th line treatment. He busted. Hischier was trusted into the position he would play out during his career, a top 6 role. Of the top 13, only Andersson busted, all other players took 1 to 4 years to get a shot at the NHL. Cale Makar, the best defenseman in the NHL by quite a few strides, took two whole years to arrive in the NHL. This year was said to be weak, with no real superstars. It yielded a top 10 center, a HOF and probably generational defender, a top 5 defender, two 1st line center and 6 top 6 wingers in the first 13 picks. Nolan Patrick was on track to being a dominant force too, before being forced to retire due to injuries. Does that not ring a bell to you ? Why was one of the weakest years in recent memory on draft day yield, probably one of the greatest draft in history ?
Ill stop here because that seems like pretty hard evidence and this post is already long enough, but you know full well that this is true for most years. Now, yes, a player can also bust when teams are patient with him, sometimes the player just isn't good, or just doesn't want it. Like Kravtsov or like Juolevi. But sometimes the snow is yellow, and that doesn't mean it isn't white in reality.