There are field-relative throwing drills and receiver-relative throwing drills. The problem with a lot of younger guys is that they and their private coaches focus a lot on stationary or field-relative throwing drills. For example, throwing over a stationary net into a big bucket or onto a matt or tarp placed on a spot on the field to try to teach things like arc and touch passing, or knocking down stationary targets like cones. Those help with certain routes where you're trying to throw to an open place on the field to let the receiver go get it. That's relative to the field.
There are other drills to help coach young QBs how to lead a receiver, which shoulder to choose, high or low, knowing how the route is run and throwing to where you expect the receiver to be, etc. Those are relative to the receiver. It's not always easy to run receiver-relative drills in private coaching. You have to have access to receivers.
Most, but not all, receiver-relative drills lean towards precision. Most, but not all, field-relative drills lean towards accuracy. Since the guy who taught me used the terms interchangeably, I've always used them interchangeably. That's wrong.