Anyone can learn to draw
At this stage they learn to draw objects such as plaster casts that don't move and can be measured and scrutinized allowing for extended.observation and learning.
Once this was mastered they would begin to study from life. This meant drawing the human figure. This is how artist learned to draw and paint. They did not acquire the ability magically, they were not sprinkled with fairy dust, nor were they blessed by God any more then the rest of us,
They simply were taught how by people that where knowledgeable and had high expectations of them. They then worked hard at practicing what they were taught until they also understood and mastered the techniques and methods.
If you are tiered of of taking drawing classes that teach you nothing, wasting your time doing blind contour drawing and other useless exercises designed to fill class time and do nothing but shield the instructor and the students from producing anything that can be judged, compared and critiqued.
if you are tired of so called teachers, professors, and instructors, that themselves couldn't explain what a good drawing is, let alone produce one themselves.