but so many things we have are black boxes now. do people need to understand how cars work to drive them properly?
And even if you understand how it works, how does it affect your day-to-day function or the advancement of the field? As Apple liked to say, It Just Works (TM).
A more apt analogy would be if self-driving cars fully take over, such that most people don't even know how to drive, let alone how an engine works.
Instead of driving you're telling a piece of nondeterministic software where you'd like to go and then watching the result as a passenger.
The difference is that people who make the cars and the mechanics who repair them still understand how that black box works.
Would you be willing to drive one if the engineers at ford were all fired and an almighty agent who kinda did the almost right thing most of the time was designing the black box?