I don't think you understand what "one in a thousand" means. It doesn't mean there are a thousand other players like Kopitar. It implies a player of Kopitar's level comes along once per every thousand pro players. He specifically contrasted that by pointing out a player like Tom Brady comes along "one in a million."
It's a value judgment focusing on rarity. And it's pretty spot on. If Tom Brady, arguably one of the greatest athletes of all time in *any* sport is 1:1,000,000, then a fringe HOFer like Kopitar is probably around 1:1,000.
Brady, Gretzky, Jordan, Ali, Tiger, these are the 1:1,000,000 athletes. A guy like Crosby is probably closer to 1:100,000.