I think I might know what you're talking about. I've met some people who seem to have had their entire lives planned for them (by their parents, usually), and all they did was follow the plan. It does give the impression that they would not be able to function outside this bubble, because they never had to. Is this what you mean?

TBH, I didn't get the impression that the people described in the article fit this category (though IMO the article was so shallow it didn't seem to go any further than "these people attend prestigious universities and work in software or in finance or in management consulting or in... marketing (???) instead of law or medicine"). If anything because the people I described whose path was planned for them by their parents often did follow traditional paths such as law or medicine, because the paths had been planned by the parents, and those were the safe options in their time.

BTW I thought medicine was still a pretty solid career.