Reality kindda bitchslapped me later. Turns out the theoretical understanding of even the most basic and otherwise fundamental aspects of my slice of engineering (EE) is pretty much essential whenever you need to design something that is non-trivial and not previously implemented by someone else and available on the Internet. All those circuits I tweaked and combined were great study material, but when it came to doing something on my own that I couldn't quite find elsewhere, which had to respond to actual hard requirements (no more than this many mV of ripple on this signal and THD below this margin), it wasn't an enjoyable ride. And then there are whole branches of EE where you don't really get to prototype stuff on a breadboard; at one point I thought I wanted to get into microelectronics (programming got the best of me though). There are literally thick books about how transistors behave, and you literally need to understand that stuff if you want to make anything slightly more reliable than a 741.
To this day, I still value intuitive understanding more than the bland math. It's the idea percolator that makes you come up with clever designs and lean, elegant solutions, but it's the bland math that actually enables you to turn it into something that can be reliably manufactured and exploited.