when steam engines were replaced with the otto motor and cars became available to the general population, people were able to repair and understand the engines themselves. they had an understanding of mechanical principles. a few generations later, and only car nerds understand cars.
everyone else has to go to a mechanic to understand why their car's engine won't start or why it sounds so strange. and those weird mechanics will fix the car for them.
nowadays people are mechanically illiterate.
/s
my point is, when a technology becomes convenient enough so we don't have to think about it while it fulfills it's purpose, then you don't have to understand it to use it.
this creates the need for specialists. is that a bad thing? i say no. who defines what should be basic knowledge and what not? we don't all need to be a mechanic, a chemist, a doctor and an ITC pro.