Talent development is a key trait in today's NFL. As you pointed out, they are two totally different leagues. The complex pro schemes are still prevalent in the NFL versus the various spreads typically run in college.
A key contributor to success in today's NFL is the ability to coach up a young player in translati between those worlds. Many NFL teams still take on athletes and understand they need to vest in this development. Sometimes it works (Antonio Gates) and sometimes it's painful to watch (RG3).
NFL coaches absolutely must recruit as well during FA. Gone are the days of staying with one team. Coaches must sell themselves and their program and why it'll win a player a ring.