I actually don't agree with people who state that Smith is definitively not NHL caliber and would not be in the NHL right now if not for his draft position.
IMO, if Smith walked onto training camp at age 25, there are some teams who would see his talent and find a place for him in a soft-minutes scoring role with PP time, and others who would cut him. Very few (if any) teams have 9 forwards with the raw offensive talent that Smith has. On the flip side, very few teams have more than 1-2 forwards who are as poor defensively as Smith. This makes him an edge case.
Some other full-time NHL forwards who currently fit the Smith mold include Robby Fabbri, Cole Sillinger, Jack Quinn, Alex Newhook, Jeff Skinner, Vladimir Tarasenko, Patrick Kane. Per 60 minutes, Smith has the highest PP scoring rate of all of these players, and only Sillinger has a higher 5v5 scoring rate. Even if you just want to look at points per game, only Kane and Sillinger are ahead of Smith. All of them (including Smith) are near the worst defensive forwards in the NHL according to my WAR model, and none of them have a good defensive reputation either.
If you want to argue that these are some of the worst forwards in the league, go for it. I won't disagree. But the point is that there are full-time NHL forwards who fit a similar mold as Smith: Terrible defensively, and talented offensively, but not exactly lighting it up on the scoresheet. So, to definitively state that Smith is just not an NHLer and that he is being totally gifted this spot due to his draft position and some agreement with Grier is unfounded. There is no way you can say 31 other teams would be playing him in the AHL.
The key distinction is that no other team would be playing a player in this mold in a checking role with most common 5v5 forward linemates Luke Kunin & Barclay Goodrow. Fabbri's most common linemates are Mason McTavish and Cutter Gauthier. Kane's most common linemates are DeBrincat and JT Compher. Skinner is the one who has been closest to a 4th line role, and his most common forward linemates are Adam Henrique and Mattias Janmark.
I won't go through the full list, but it's clear that Smith is being deployed differently than other forwards who fit a similar mold. That's why it feels like he's out of place, or like he's being forced into the NHL. If he played in a role more suited to his strengths, he'd look more like a limited, soft-minutes 3rd line scorer who gives up a lot defensively.