Very few colleges run pro set offenses anymore, so the drop back QB in college is obsolete.
The only way to win in the NFL if the QB to be a drop pack pocket passer.
The minor leagues no longer produce.
The salary cap has really damaged the quality of play in the NFL. Two simple reasons: (1) teams have no chemistry because they are turning over half the roster every off-season; and (2) teams don’t groom young talent anymore, and instead they end up drafting young guys and putting them in the starting lineup long before they’re ready to play. Item (2) is especially obvious with young quarterbacks.