I have no doubt that Wilson is not taking all that is there on each play as he hunts big plays and then gets into trouble as he holds the ball.
Nor am I under any illusions that Fields was doing any better. Fields time to throw is just as ridiculously long as a Steeler as Wilson's is. Steelers coaches publicly stated that Fields leaving plays on the field in the passing game was a major part of the reason to turn to Wilson.
It isn't like either guy is lighting it up with a high powered offense. Wilson gives you big plays with his arm. Fields provides them with his legs. For me it comes down to Fields being 10 years younger and looking like he is willing to change/adapt his play style to whatever the team needs.