Did op amps on a uni CS degree in 79-82 and they never explained why. "Learn this" was an unhelpful approach where "these are building blocks which matter in di

Did op amps on a uni CS degree in 79-82 and they never explained why. "Learn this" was an unhelpful approach where "these are building blocks which matter in digital communications, IO, control systems and signal processing" might have helped. Same with numerical methods. Zero sense of why we had to learn, and I failed spectacularly.