The saying "A Jack of all trades is a master of none." mostly because it implies that there isn't value in a diverse set of skills. My understanding is, however, that the whole saying is "A Jack of all trades is a master of none, but often times better than a master of one." It's unclear why this phrase was shortened, but you can't help but see how its usage in the media lends to the notion that one should specialize instead of generalize. Something that directly supports the higher education structure and track post primary school.

Personally, I've made a pretty successful go at generalizing within my field, so I definitely resonate with this one.

The concept of "Stockholm Syndrome". Britannica defines Stockholm Syndrome as follows:

Stockholm syndrome describes the psychological condition of a victim who identifies with and empathizes with their captor or abuser and their goals. Stockholm syndrome is rare; according to one FBI study, the condition occurs in about 8 percent of hostage victims

This concept is widely excepted as a kind of mental breaking, of someone doing something that would appear illogical or irrational. However, the coining of this notion stems from a bank robbery in Stockholm in 1973. I'll simply link to the backstory from Wikipedia, as it encapsulates the issue pretty well.

https://en.wikipedia.org/wiki/Stockholm_syndrome#Stockholm_bank_robbery