If we cast our nets wide enough, we could do exactly as you say. But we don't - we focus on a handful of elite players who will either make or break the class, rather than emulate Bama by evaluating and recruiting tons of them.
Had Bama lost Kirven last year, their fans wouldn't have batted an eye.
"Upon examination, it was clear that the spine of the PATT wasn't fully formed and, therefore, quite easy to snap." - Charles Darwin, "The Origin of Species"