It's actually even stupider than they're presenting it to be. The speech that was being "compelled" was explicitly not intentionally and repeatedly misgendering someone after being informed of their identified gender while working in a publicly funded position. I.e. when someone is acting as an agent of the government of Canada, they're not allowed to intentionally misgender people.
They can literally quit their jobs if they don't want to do that, our speech is constantly compelled in similar ways in the workplace but they never care about that, because that's how jobs work. I may want to tell customers to go fuck themselves if they're rude, but I'm compelled to smile and nod and keep that for the break room afterwards if I want to keep my job.