I can tell you they're not Electronics Engineers.

Electronics Engineers are like "we have to design this so that it can handle a power source whose voltage can be between +5% and -20% of what it says on the box" or "assume the resistance of your resistors, the capacitance of your capacitors and the inductance of your inductors can be randomly off by up to 10% plus it changes with temperature".

I switched from Physics to EE at Uni and it went from "these formulas represent the world" to "here is the empirically measured curve of gain vs temperature (were the difference between extremes is over 1000%) of a common transistor you'll have to use".

Maybe it's the area within Engineering or maybe Engineers get taught differently over there, but at least half of my degree was about dealing with how the real world deviates from the "purity" of Mathematical Formulas.