The vast majority of jobs are not decentralized and will not be for the foreseeable future. You cannot be a steelworker or waiter or actor from a home office or location that doesn't have high in-person demand for those things. There are countless reasons jobs are (and should be) concentrated around big cities. You are lucky and speaking from a position of privilege if this is not something you worry about.
This is not about me and so-called privileges. You forget the large amount of jobs in farming, handiwork, healthcare, and so on. There are certainly ways to decentralize through policies.
I didn't forget about any jobs. Sure, some jobs can be less centralized. But you said "There is no point in concentrating jobs around big cities". This is wrong and I corrected you.