First of all, I asked for "all these" players, not one. Of course it's possible that Mookie sustains this level of production. The question is not possibility, but probability. I promise you that for every Willie Mays, I can find you many more Nomars, Evan Longorias, and Grady Sizemores. Second, 5'10" in 1956 was about two inches above average height, where 5'9" now is about an inch below. For the typical U.S. male. For an MLB player, he's even relatively smaller.
You just can't project the 5'9" guy to put up top tier hall of fame numbers for the next ten years. What're the realistic odds of Mookie putting up a 1.000 OPS at age 32? 2% 5%? .900 is more likely, but by how much? I'd have to say based on historical trends, he's more likely to be sub-.800 at that age than .900+. Obviously the defense is valuable, but even more so than his slugging dropping, we can be sure his speed will decline. How much defensive value does he add when that happens, or maybe he has to move to left?
In my opinion the optimistic upside scenario for Mookie is something akin to Jeter's career after his 1989 season (.989, 153+) at 25. Of course he was a useful player, but he never came close to duplicating that season. Would you be okay with the Red Sox paying a player like that best-player-in-the-game money? And how unhappy would you be if the Sox instead locked him into that contract and he turned out to be Nomar after his 26-year old season?