Schools will have an instructor that will favor teaching either theory or lab. What ever they favor the student will be lame in the neglected part.
Even the test in post 10 favors theory. Apprentices used to hook up with a journeyman during the day and get schooled at night. This was supposed to balance theory and practice. The handful of good techs I've known didn't wait for knowledge to be handed to them. They took it on themselves. School is never enough.
Many journeymen of the past didn't have a lot going for them either. There was a bunch of bad information out there. Beer can theory in many ways.
We all have heard comments about a young couple going into the world and people saying "They will never make it" Most do somehow.
Being an electronic engineer in my previous life, the teachers in my local tech school are pathetically lacking in theories. One ridicules comment I remember goes like this " in a well designed circuit, a load will use up all the voltage between L1 and neutral..."
Pretty sure most guys fresh out of school would do bad at that test. They do not teach like they use to. Tech schools have become little more than money making scams that have kids thinking they will be able to start running service when they graduate, and believe me they all graduate.
You need to put the phone down and get back to work!