I suppose you have a point that we don't have definitive public polling on Peterson's position on pronouns. However, it's hard to differentiate Peterson's large popularity and support from his stance against Bill C-16.
I'm not a legal expert, but I suppose Peterson doesn't think the government should be disapproving of speech in this area. It seems that a Canadian University quickly got tripped up on Bill C-16. Even though I understand your point regarding the difference between disapproval and prohibition, we have real world confusion as to Bill C-16's intended meaning.
Per Wikipedia: "In November 2017, Lindsay Shepherd, a teaching assistant at Wilfrid Laurier University who showed a video of Peterson's critique of Bill C-16 in her "Canadian Communication in Context" class, was reprimanded by faculty members, who said that she may have violated Bill C-16 by showing the video and holding a debate."
For the record, I don't support discrimination based on gender, gender choices and sexual preferences.
If I remember correctly the Wilfred Laurier faculty quickly backtracked on whatever it was you're trying to say they did wrong. Your quote seems to assume we all know and care. And likewise know and care about Peterson. What speech you may suppose Peterson doesn't think the government should be disapproving may be relevant to something, but I can't see how it would connect to Air Canada's recent change in how they address passengers. Even if I cared about that.
Your response to Dave, had some logic, but it doesn't fit this situation at all. There's nothing in the report about pronouns. No one has asked AC to do anything any more unreasonable that to stop using an entirely gratuitous, and unnecessary phrase that seems to bother some customers. What's objectionable about, "Good morning passengers"? Surely it's the right of any company to address its customers as they choose, within the bounds of good taste, common courtesy and the law. But if you have objections please give me ammo in my quarrel with being addressed as 'WalMart Shopper' when I've bought nothing from them, and am of settled intent not to.
And FWIW 'Ladies and Gentlemen' is an outdated holdover from XIXthC British music-halls, whose attendees were usually anything but. In any place attended by real gents and ladies, the address would be , "My lords, ladies and gentlemen". These days the most common protocol is some scratchy mike-noise follewed by 'Hey y'all'.
And CTV NEWs knew what would grad the righty-tighty eyeballs.