The only "if" here is if the late first round pick two to four years from now turns out to be as good as Hartman has been over the past two years in the NHL, let alone whether said unknown player actually makes it to the NHL.
Typical HF board to believe that the potential unknown x player (lower) first round draft pick is worth more than the actual former (higher) first rounder who's been developed, still is young and inexpensive, can fulfill multiple roles on a team, and who currently is playing in the NHL. Plus, he's a little bit nasty and he's been traded to a direct in division rival. Don't relish seeing him annoy the Hawks in the future.
The only way this works out for the Hawks is if the big bodied Swede is able to play in the NHL. Otherwise, they traded the wrong forward (should have been Anisimov).