Thats just the way it is. And no one is quite sure why.If that is the way it is, there is a Being who made it that way. And if He did not feel the need to reveal why at this time, that is another test of faith.
The big one: Do we really need so many chromosomes? Thats what Zhogjun Qin and colleagues at the Key Laboratory of Synthetic Biology in Shanghai wanted to know.And why should the Author of DNA and chromosomes reveal why to those that deny His existence?
A fall would have come in some other manner instead.
But it sure seems reckless to try to muck around with the chromosomes in the real world, and the science of the consequences may belatedly tell us at least some reasons for the partitioning. Probably something like: if it goes wrong, it will go wrong grandly.