but, it's true: this is the screwy doublethink business model of modern physics instruction.

they teach you things that are wrong, and force you to do it wrong, even if you can figure it out. they'll tell you you have to do it wrong before you can do it right, like a sick, twisted hazing ritual. and, then they do it over and over again.

so, you need to resign yourself to the fact that they'll teach you a different wrong thing next year, and then undo it the year after.

and, if they just told you how to do it right in the first place, they'd collapse their ponzi scheme: you wouldn't need eight years of physics, you'd need two or three.