By my logic? Or by your strawman?
I am no fan of Guenin, and can't wait for him to be off this team, but relative to his normal level of play, he hasn't actually been that bad. Simply stating he's playing ECHL hockey because he has in the past certainly is not the fact of the matter.
I want Gormley to play right now too, but like I said, with the team makeup, there isn't an obvious pairing for him. If Barie was a little bigger and maybe a little better defensively, Gormley'd be glued to his left side no matter the mistakes he's occasionally made.
If Zadorov hadn't made a few of his own mistakes and wasn't showing he's a great fit with Barrie either, Zadorov wouldn't be taking that LD spot on the 3rd pairing.
If Holden hadn't played the best hockey of his career to start the year, Gormley would be on that left side with Guenin or Stuart.
If Gormley wasn't waiver eligible he might have started the year in the minors after his tough pre season game against LA, to slowly develop him game with more minutes.
It's not as simple as just saying Roy's too stubborn to play Gormley over Guenin.