At college one professor used a particular engineering class to weed out students from the engineering program. He intentionally made it so challenging it was considered its own prerequisite.
I found the practice abhorrent even in that context.
Agreed. When my girlfriend was on a pre-med track in college, I distinctly remembered that she graduated with her biology degree knowing the diameter of a mouse hair cell but not knowing what the liver did. She graduated sumna cum laude, but did not have a good systemic understanding of the body at all. And the reason was that premed programs were designed to weed out the kind of people who couldn’t memorize vast quantities of information.