I don’t believe that there is a real answer?
It all goes back to the “God can do anything” meme!
For instance, some have said that it was done so future generations would remember!?
Heck, God could accomplish that without all of the fuss! 8-(
That said, the things we see God do and say give us clues as to His wonderful nature. Ergo, it doesn't hurt to speculate if done respectfully. If He wants us to know, He'll probably help along the way.
Yes but then men would bet to accuse Him off taking the easy way out and accuseHim of not really loving us because it didn’t really cost Him Nything