Uh. It's actually pretty plausible. In a lot of executive meetings with dissenting opinions, leaders let people make their cases and sometimes things get heated. If you're in charge, sometimes you don't want to actually say anything because you'll influence the process. You ask questions and take in the information and then once you've heard all arguments, you make the decision. You let your team try to convince you, even if you lean in a specific direction.
You're really reaching here. There's nothing on record of Benning specifically wanting Glass over Pettersson. Someone in the org evidently did though. Wasn't Delorme, Brackett or Gradin though since they are on record pushing for Petey. I'd personally wager / speculate Weisbrod purely on the fact Glass demolished the Swiss in a game he was in attendance scouting.
Glass scored 2 goals and 1 Assist that game.
http://reports.iihf.hockey/Hydra/506/IHM506A13_74_6_0.pdf
Also - if you listen to Linden's answer in the 650 interview - he's asked a leading question about how important it was to give Judd the autonomy to make picks to which he replied that it was very important to give Judd autonomy to make picks.