This means that working does not provide insider access to potentially better (or alternative) jobs when coworkers move on. There's no implicit social framework for insider information. There's no personal channel where a Lyft driver finds out that Uber is a better opportunity (or vice versa).
To put it another way, two Lyft drivers have little basis for connecting on Linkedin. Not that I think Linkedin is great. Only that gigsters don't even get the loose social connections that Linkedin facilitates...and cynically, the gig economy casts other Lyft drivers as competitors rather than coworkers.