A capitalist employer selects an accountant from a pool of 100 applicants. A feudal lord would groom a serf boy who has a knack for horses into the job of the adult stable man.

A capitalist employer grooms a management trainee for a future role, while a feudal lord selects a mercenary from those applying for the job.

My vote is for "false dichotomy." There has been a rise in selection (because the world is freer and more connected) but there is still plenty of grooming too. Note that even in your stable boy example, there was selection.