Earlier quoted context omitted.
Generalist means something very different for big orgs. At FANG size companies have people to setup 401k and health insurance, tiny startups need 1 of 3 people to figure that out even if it just means finding a company to outsource such things it still needs to happen. Payroll doesn’t need to be a complex system but taxes must be paid etc.
That shows an ability to figure out what needs to be done and do it, regardless of whether it fits the formal job description. That can be an invaluable skill in an organization of any size.
Expertise gains value when it can’t be subdivided. A doctor needs to know a who lot of related skills to be a heart surgeon, it doesn’t work to split it into two less demanding roles. However two generalists can sub divide the workload of a generalist with a lot more experience because experienced generalists aren’t particularly skilled at anything.