This is laughably over blown.

I don’t expect my doctor to know the component parts of atoms. Nor do I need them to.

I don’t expect a designer to know how a pixel works.

At some point in the stack we have to draw a line and say this level of detailed knowledge is not generally useful to the majority.

In terms of generic web development today, I would be fine at drawing that line at low level system concerns (memory allocation, cpu cycles, hell even compilation)