While I agree with you, from my experience, it seems like something that is more often normal to have knowledge of for older designers but seems like more of a passion for young designers to fully grasp as they may have to go out of their way to acquire such skills. I've found great people to work with of all ages but if they don't have coding skills and understand the evolution of graphics into interfaces or web assets than it becomes more and more difficult to continue working together on tight projects.
For the former though, I actually wish more designers had better knowledge of the "shallow and antiquated schools of thought" from the print world. A lot of that was born out of decades of iteration, and many of the toys that the web gives us aren't actually very useful for the kinds of content that many of them are tasked with publishing.