There's been a lot of talk about software unions, and based on the horror stories from the video game industry, game developers would probably benefit most.
There's also a lot of talk about offshoring development jobs to contractors on Upwork who charge $2.50/hr. For games, you'd probably need an offshore person in the $30-$40/hr range, but still much cheaper than a domestic employee. If there's a union, what's to stop the big companies from doing that and bypassing Americans altogether, as some companies are already doing?
Worse quality of games leading to greater competition from domestic indie devs?
There's been a lot of talk for at least 15 years now. I'd like to see some action, finally.
I think it's also hard because it's not as if crappy hours, tight deadlines, and low pay are directly killing people. Sure, stress is bad for you and you deserve to make enough money to provide for yourself and have healthcare, but I imagine conditions are overall still better than at the beginning of the labor movement, which involved rather dangerous factory work. It's easier for people to tolerate 60+ hour weeks and the like if they're paid well enough or if they hold hostile views towards unions, which I don't think is uncommon in the software field as a whole.