I think we need to contextualize what the players are, and what the NBA wants here, regardless of “what people thought” which is sort of meaningless.
Wilson is 6’10", can handle the ball well enough to attack an opposing big, is a willing passer, and has range out to the three point arc - at least if you leave him open. The NBA is always going to want that guy, it was just a matter of him showing those skills in game action enough for a team to feel comfortable he possessed them. He did, a team did. Bingo.
Matthew is 6’5" (an NBA 2 guard) with a shaky handle (NBA teams are always going to count on the two guard to be a secondary ball-handler, which Matthews isn’t for us), a questionable three point shot (for a shooting guard - there’s a big difference between a 6’5" kid shooting 37% from 3 in college and a 6’10" kid doing it, and we all know where the NBA is trending on 3-point shooting). What he does have is NBA athleticism.
My point - the theory of what DJ Wilson can be is the proto-type of the NBA 4. The theory of Charles Mathews, today, is…a backup shooting guard?