There something to be said for not rushing top end prospects into the adult game of hockey, some can do it, however if they're not yet done growing or aren't grown into their frame yet, it can be incredibly dangerous.
At 17 years old, defender Adam Jiricek plays the Czechia Extraliga a mens pro league, yesterday he was absolutely destroyed by 27 year old Jan Scotka; take a look.
Honestly, I think this should've serve as a wake up call for organizations as well as prospects that if you're not physically mature, moving a player along before they are is a recipe for disaster