That's exactly the point, even if pilots use autopilot most of the time (level 4 autonomy).
Guess when they take control? When something bad is happening (and there are literally a million things that can go wrong and the autopilot could not fix, ever).
Guess why MCAS did not result in more crashes (the system has been known to malfunction a couple of times before the crashes)? Righty because there were pilots that could manually control the plane well enough to land safely.
