You also can't draft a guy like Keegan Murray, because he's already 21+ years old and thus he must never get better. The youth fetish amongst the NBA everyone can basically go **** off.
You can draft Keegan, but prob not in the top 5. Lets look at Jabari 2 yrs from now and then compare him to present day Keegan.
If Keegan is playing till he is 39-40 that would still be 18 great years. A lot of mileage regardless of his starting age.