1. The Traditionalists: Students who are fascinated by the technology and what it can do at its limits. These people are disproportionately drawn towards the more arcane/unsexy applications (RF, hardware, high-power, radars, antenna design, IC design, embedded systems, robots, rockets, quantum computing, etc) and research.
2. The New Wave: Students who were inspired by a Steve Jobs keynote, these people were almost exclusively interested in potentially mass-market user-facing applications and have a greater emphasis on image (both personal and professional).
3. The Unmotivated: People who are there "because it pays well" and for no other reason. Not many of them made it to graduation, and the ones that did were "meh" engineers at best.
Most of the naive junior engineers you're seeing probably belong to the modern incarnation of category 2. Steve Jobs has been dead long enough for new grads to have been inspired by the next generation of buzzwords. They're fine engineers in general, but they have a sometimes unhealthy fixation on said buzzwords and how "future" they are, because that's what got them into engineering. Most will concede when a simpler solution is presented, but it's uncomfortable for them. Unsexy but effective techniques undermine their aesthetic impulses and, to a degree, their self-image as engineers.
A good popular example is Elon Musk refusing to use LIDAR on Teslas, and introducing way too much automation, too fast at Tesla's factory. People, even junior engineers who think they're part of a "ground-breaking" movement often have trouble separating "obsolete" from "tried-and-true".