It's the material reality of what people live through. When one is entirely alienated from the product of their own labour, what do they care for the mission and culture of a company who will fire me at an irrational whim? Better to have a vibrant life outside of work to keep oneself sane.

Well, especially if the mission of the company who will fire them at a whim is driving "engagement" at any cost in order to sell ads, or (as in the case of the company I work for since the company I originally applied at was bought out), sell sports data to betting companies, who can blame them?