It's not unique but the games industry is worse than most.
There's a natural cycle to the development of a video game that's very atypical for most software products, involving a long slow ramp up of workforce followed by (unless you've been very very careful) a total lack of anything productive for 95% of any of those people to do for the forseeable future. What to do? Toss 'em on the street, that's what to do. Then couple that with it being a glitzy career that will attract lots of replacements for any of the hapless people you fired, which also applies to any way you want to abuse your employees or underpay them, and you have a recipe for lots and lots of abuse.
Unionization is also super uncommon at these game development companies. Would definitely help prevent layoffs. True for every industry again, but they are underrepresented here.
I'm sure you didn't mean to imply that unionization NEVER prevents or at least helps to prevent spurious mass layoffs, since that would make you a total imbecile about how labor relations in general and collective bargaining in particular works or at best an otherwise rational victim of gaslighting disinformation campaigns carried out on behalf of the people doing the layoffs.