The huge majority of companies operate on nothing like this model. Either they aim to build up a workforce for the long haul and as such care about having a sustainable workload, with occasional spikes and lulls, or they’re just jobs that are hard, that suck and that as a result have a high turnover and pay relatively well for low standards in hiring. See working in an Amazon warehouse.
The companies that do follow this model suck, like EA, but again that’s not a secret. There’s an inexhaustible supply of suckers for every industry that people really, really want to get into and whether it’s film or video games they’re always awful, though at least film pays better.