I get the size concerns about Wolf because if he didn't have them he'd be fighting for that top spot among drafted NHL goalies. He's an extremely smart goalie that understands what he has to do to make it into the NHL at his size. That Carter Hart season you refer to was his DY+2 which Wolf hasn't played his yet. Using SV% is definitely the wrong stat to use when comparing especially across multiple leagues as not every average shot is equal in every league. Dustin Wolf though has dominated statistically in his past two WHL seasons. We're talking about a goalie who hit the +50 Goals Saved Above Average mark in his Draft Year and had a 0.992 GSAA/30 (shots) which is rare in that only Hart, Bartosak, and Kuemper hit those heights in the last 10 years of the WHL. This season Wolf ended with a 45.547 GSAA & 1.038 GSAA/30. No one in the WHL was close. Jiri Patera in his overager year was the next highest in GSAA with 27.043 with a 0.614 GSAA/30. Dylan Garand, Joel Hofer, and David Tendeck all had similar SA/60 as Wolf but none were close in either GSAA or GSAA/30.
The skill set we see him employ plus the results make it very difficult to bet against Wolf. Pretty much every other goalie prospect you're hoping they show the ability to keep up with the game mentally or physically as they progress. Wolf doesn't have those holes. He's too good for the WHL and would honestly benefit from playing pro hockey though that's obviously not in the cards even if he was allowed to. Statistically speaking not even Carter Hart's draft years numbers were close to Wolf's as Hart posted a 25.878 GSAA and 0.482 GSAA/30.