Yes, Moss might have made the NBA. But Moss is what, 6-4? Did he have point guard skills or was he a lights out shooter? If not, he would have been a very dark horse.
Meanwhile, I can think of at least a dozen current NBA players who could play in the NFL right now. I'd start with LeBron James (can you imagine him as a pass rusher coming off the edge?), but there are plenty of others, including BBD.