Ok but there's a difference between a small winger, a small center, a small bottom pair dman, and a small top 4 dman. You see many more successfull players in the first category than you do as you go down the list.
I'm thrilled to have a talent like Hutson in the prospect pool. I'm also realistic and don't know if he'll make it as a top 4 dman or even a bottom pair dman. But even if he doesn't, I think he'll make it as a winger and pp qb.
But there are too many factors for me to know either way. And they aren't merely limited to his physical and hockey development. God only knows what rules the NHL will keep amending and more importantly how the refs will defacto enforce them, particularly in the playoffs. Smaller players will have bigger or smaller roles accordingly.
Actually, if you count a 3 to 2 ratio (F vs D), pro rated, there are as many small highscoring Ds than small highscoring forwards. The past and that 3/2 ratio skews your view. The difference in number is more related to forwards outnumbering defensemen than anything else. Highscoring small players, whether forwards or dmen, usually make it first and foremost because of high hockey IQ.
Also, since forward is the smallest position and getting smaller, the game also getting faster, I foresee a 180° flip in height, where we'll see the present average decrease slowly and it has already started, especially when it comes to highscoring players.
Concerning your last paragraph, I would tend to think the NHL will follow suit with the NBA and keep adding offense as it is what sells. So, I'm not concerned about Hutson making it. Maybe his defensive defficiencies will make him a winger, but I doubt it, because Hutson aligns three major attributes; high IQ, high puck skills, but most importantly, high compete, which should bridge him towards having a more complete game.