But under my scenario, said owner might have a bust in the 1st round but a solid major-leaguer in the 4th. And he wouldn't know he had the bust in the first round for probably three seasons. He'd draft a guy with a 53 CUR and an 83 OVR, and expect that after three seasons, the player would be somewhere around 70 CUR. Except the guy would be at 61 and stuck at High-A.
Meanwhile, over three drafts, he might have 18 guys who project as very good major leaguers, of which four are on pace to get there, and maybe 4 others are now looked upon like 4th OFs and long relievers, and the other 10 just aren't panning out.
So the guy wouldn't necessarily leave.
Regarding death's point, a guy who has $20M/$20M for College/HS scouting would still have more accurate pre-draft projections than someone with a $10M/$10M. It's just that there would be a larger pool of guys who on draft day looked like they had potential.