I've seen it argued that the "training montages" of modern American cinema (Rocky is a usual example) are responsible for a generation of kids growing up not really appreciating the value and importance of real and difficult work. This is usually incorporated into the same general complaint I've heard from older, usually right-wing folks about Kids These Days being given "too much" self esteem, trophies for participating, not being able to fail their classes, et cetera.
So, just to be clear, this montage is depicting difficult and intensive training at a fevered pace over the course of six hours, at a time when both characters would normally otherwise be asleep. We, the audience, are skimming through it. Cheryl and Jamie are not.
And, to further clarify the nature and importance and value of this kind of difficult training and hard work - this work does not inherently entitle Cheryl or Jamie to anything. It's hard, it's exhausting, it's real, but neither of them is currently earning a dime nor securing a position, nor should they. In fact, Greg would be upset to find them here now.
That's right, you hypothetically lazy and over-praised generation; Cheryl could very well put in 110% effort and learn how to cook expertly, and very well might still be immediately fired, in much the same way that working hard in school and getting straight As does not entitle one to a six figure job. One earns paychecks in exchange for the provision of value, not the expenditure of effort.
There's your value of hard work, kids. Now get off my lawn.