If you're in school, everything being taught to you should be considered a core task and practically required. You can then reassess once you have graduated and a few years into your career as you'll now possess the knowledge of what you need and what you like and what you should know. Until then, you have to trust the process.
Not sure which particular parts are confusing, so I'm going to guess and rephrase like this:
People are obviously different, it's obvious that a certain process can't fit all sizes, so if there's a kind of "attitude" with which that process fails, then the problem can be both with the process and with the attitude.
And in my personal experience there are processes which work just fine with that attitude.
Processes are built for human needs. Not humans are built for processes.
So the problem is with the process, which includes the instructor who seems to think that it's not.