I understand why taxes are needed, but some are just plain theft. Like inheritance tax, why does the government feel that they are entitled to take a slice from money that people have carefully saved and already paid taxes for. Same as with donations. I someone gives me money the government has nothing to do with that.
Unless you have actually failed to understand/retain relevant theories of distributive justice (like Rawls'), rather than just disagreed with them, this seems like a bad example.
For me, I'm having a hard time with music theory, the finer points of harmony in particular.
On the topic of transistors, on a behavioural level, IMHO the key is not just read about but 1) analyze circuits yourself, lots of them, starting with the basic ones, on paper; small/large-signal, input/output impedances, gains, distortion, diff/common mode... 2) design some transistor circuits, again starting with simple ones (again on paper, then verify with SPICE). On a fundamental level, beyond simple drift-diffusion models, frankly the first step is to get a graduate degree in semiconductor physics. Most people don't need that.