Who said that? I haven't seen that anywhere.
While the scouting reports say Hughes is the best player in the 2019 draft, they also say Kakko is the most NHL ready.
Kakko should be the Calder favorite next season due to the fact that physically he has developed quickly and has a man's body, and has played in a man's league. Granted, that "man's" league, isnt anywhere near the NHL's caliber, but it should count for something. Read the scouting reports and most acknowledge Hughes has some bulking up and strength-training to do. Only way I dont see Kakko winning the Calder is if someone raw coming out of 2018 takes is, like a Barrett Hayton for instance. That's always a strong possibility given the young age and extra year of experience.