It ia true that everybody can fall into that trap. Becoming blind to weird quirks of your own product is the equivalent of a senior professor becoming blind to

It ia true that everybody can fall into that trap. Becoming blind to weird quirks of your own product is the equivalent of a senior professor becoming blind to the fact that the stuff they need to explain is hard to fresh students. The thing is, that not all people suck equally bad at this. A big part of it is to actually care and be empathic enough to put yourself into the shoes of the un-initiated. Two people who both have used the Bash shell a million times might have a completely different understanding of what makes it weird and unintuitive to someone starting out, even if both had trouble when they themselves did. Looking at things with a fresh mind is a skill one can get better at, just like you can learn how to look at actual light and objects to draw what you see instead of drawing what your brain tells you you see. It is a hard thing to learn and it is something that can fail you even once you became somewhat decent at it, but every good educator needs that skill.