I understand what you are saying, but I also have spent some time in the Red Sea. It is not “shallow”. If the parting occurred where it is historically believed, it would take a geological event of epic magnitude (which is within God’s realm) to drain the Red Sea long enough for Moses to cross over, and then recover. I have not heard of any evidence of such a natural event, which is not to say it didn’t happen that way, just haven’t seen any evidence to it.
I don’t dispute that it happened and I don’t dispute that it was a miracle from God. I just have a problem with people claiming it’s “impossible” so I start throwing out legitimate possibilities as far as how it could have occurred.