I agree that RB is devalued by the NFL, but that only really matters in terms of early round draft capital and guys seeking big-money second contracts. In fact, you could argue that guys like Small have a greater chance of being selected late or signed as free agents and sticking as teams look for passable NFL talent at the position to avoid using higher end draft picks or spending big money in free agency on a position they feel can be filled with day 3 picks and free agents. Arian Foster, for example.
Additionally, being the starter in college is overrated. Roschon Johnson was just taken by the Bears despite being behind Bijan Robinson at Texas his entire career, and is logging major snaps. Donovan Edwards will be drafted out of Michigan despite splitting carries with Blake Corum. Same for Miyan Williams at Ohio State despite splitting carries with Treyveon Henderson. Montrell Johnson at Florida is another.