I am not a pro chef, so I will say my bit and then shut up. I am a college professor, and thus can perhaps comment on this issue of "entitlement" among young-ish upper-middle class Americans.
It is usual in my profession to blame the high schools. High schools blame the government, the parents, and the elementary schools. The elementary schools blame the government, the parents, and the academic education establishment. However, every sane analysis suggests that at every level, the U.S. educational system, in every corner, is primarily successful at teaching self-esteem. Unfortunately, the students do not, it appears, have what I for one would call deep self-esteem: they are very fragile, and because they have never been challenged, they do not have the maturity to handle any form of criticism. If they receive grades lower than they expect, if they are not rewarded for whatever low level of effort they choose to put in, they respond by flailing at the teacher, boss, system, etc. This is what small children do when told they can't do something, in case you don't recognize it.
I can boil it all down very simply.
A number of statistical studies have addressed the following basic question: how much effort do you put into your schoolwork, and what grade do you deserve? Answer: I put in a huge amount of effort and therefore I deserve an A. Details: 1-3 hours per week on a given course is "a huge amount," and that time is normally "multi-tasked," meaning that the student is also watching TV and text-messaging his/her friends. Crucial point: "a huge amount of effort" means what you chefs would call zero.
Second, even more important point, and the one nobody ever notices:
If I work very hard, in my own estimation, I deserve to be rewarded maximally.
What if you're stupid? What if you're untalented? What if you really do work like a dog but produce terrible results? These things are impossible in the students' world. They accept that others might be limited in these ways, but they are not: they can do anything they want to, and doing it -- "living their dreams" -- should require them to devote a pretty small fraction of their time and effort. Anyone who disagrees is out to get them, unfair, prejudiced, whatever.
It is no surprise to me that students who choose to attend famous and expensive culinary schools tend to be like this. The student decides his or her dream is to be a chef, so he or she pays the bucks, sits through the classes, gets patted on the head, and expects the chef at the new restaurant to applaud.
Ultimately, unfortunately, this has very little to do with the culinary profession. It has happened and will continue to happen in every profession that attracts attention as a cool thing, which is why you didn't get these people so much 20 years ago. Unfortunately, as well, the various things that probably would go a long way toward fixing these problems would require such a total overhaul of the American education system, from nursery school to advanced graduate and professional schools, that it will never happen consistently or coherently.