Obviously because the attitude is height is some massive advantage and there is insane bias at every level. Wolf was barely drafted after having an amazing junior career.
Look at the 2nd goalie drafted in his draft year 37th overall Mads Soogard:
909 in the NAHL
921 in the WHL
908 in the WHL
Oh but he's 6'7 so that makes him good
Meanwhile Wolf went:
928/935/936 in the WHL
Oh but he's short so he sucks
yep, what you are saying just about for sure plays a role. Coaches (people) often get caught into the groupthink of the day.
That said, people also want to win. If you think back to all the thousands of coaches and players and parents and goalie trainers at PeeWee, Bantam, Midget, etc. they will mostly be playing the kid they think gives them the best chance to win. These kids arent even done growing at this point, so its a crapshoot for height and its going to come down to who does the job best on each individual team each year.
Being 6'4 or over puts you into 1% of men.
I think the cream rises to the top, even if I agree that there is discrimination. There would be guys under 6' winning, or being finalists, for Vezina's. Tim Thomas, Sauros.... these guys are badly outnumbered by a population that is a minority.
I get it. Eveyone used to rave about Rick Nash and ignore Marty St. Louis, year after year, no matter how many times Marty was better. It takes awhile for mindsets to change. And maybe you will be proven correct. Maybe scouting will shift, and overall perception.
I think the league would be flooded with guys under 6', though, if it werent a big disadvantage. Drafted or not, the Marty St. Louis' of the world will get picked up and developed by someone... there's just too much to gain to not take a shot on a guy who is proving himself regardless of sports cultural mindsets.
I think, probably, where i 100% agree with you, is that a ton of tall guys who arent actually quite NHL calibre, are probably being given the benefit of the doubt, a wing and a prayer, a "well, maybe he can develop.... he is the right height for the job" but i would think those guys would fizzle out and be given up on before too long, replaced by more like them, for sure, but also replaced by anyone that proves themselves. The fact is that there have been a TON of very succesful, TALL goalies since the stacker goalie pads and modern style became a thing. Not just 'making the league' succesful, but also Vezina/save %/ Stanley Cup successful.