The "so what?" is that as long as there is a plausible explanation for a given phenomenon's being caused by the Flood, you can't use it as an argument against YEC belief in the Flood.
Can you imagine any phenomenon that you could not find a plausible explanation for by being caused by the Flood?
As I said, I do what I can with what gets thrown at me. I don't expect to be able to answer everything that gets thrown at me but I have faith that it can be answered nevertheless.
I'm not asking about what is thrown at you. I'm asking you about what you are capable of envisioning.
Can you think of anything at all that you wouldn't not be able to explain with the Flood?