Gyroscope physics and mathematics is bad enough. What you do to them to make useful aircraft instruments is worse. And what happens when people who don't understand them write "model" answers to sample examination questions in "confuser" books is worst of all!
(Example: a question about whether your "gut feel" goes in the same or opposite direction to a gyro. Long involved ramble about inner ear hairs and air vanes on gyro rotors and so on. All complete bollocks - all you need is a one-sentence understanding of general relativity which enables you to say "neither your body nor the instrument can tell the difference between gravity and acceleration".)