Before the pandemic, Air Canada was highly profitable, with a 50$ CDN share price, and making deals to buy other airlines.
Don't confuse asset write down, and other chicanery, for loss. Not when they're buying up airline after airline.
I care about the environment, yet you're making my point here. You equate "caring about the environment" with "making change no matter how small, everywhere, in every thing, without focusing on big issues first".
An example, getting the US, for example, to reduce hot water usage even mildly, would do more for the environment than decades worth of "make people's knees hurt", "adding two seats to rarely full planes" mentality.
Hell, here's an idea which would save, in one month, more than those extra few seats in a decade (which are only used on full flights.. a rare thing).
Pass a law, that airlines must share flights if not full enough. That is, if a flight is less than.. 65% full, then the flight by law is cancelled, if competitors have a closely timed route, but, also by law, a competitor must take those passegers and kick a commission to the originating airline.
That's actual change. That's actual savings. That's less convenient, but no, you'd prefer to make my knees hurt. And care to assign cost to the poor, if people don't want that.
And again, I have flown plenty, and have only once seen all seats occupied.
How many flights have you been on, fully seated? Be honest!
No. The truth is, profits (force people to pay for seats with more legroom, like as doors and such).
End of story.