I'll put my 2 cents in.
I have been trying to make sense of God and life for 62 years now.
We all owe God one death.
If there is no God than we don't owe him a death and if there is no God the first born in Egypt were
not killed.
There is a lot of evidence there is a God.
And a lot of evidence there was a flood.
But in the end it seems to balance 50/50 so we have to have faith one way or the other God or no God.
That seems to be the great controversy of life God or no God.
As far as people being destroyed in the flood of Noahs day the bible and history talk about the Nephalim.
The Nephalim were fallen angels.
And their coming to earth brought about all the violence.
God had the flood it appears for more than one reason to destroy the Nephalim and curtail the violence so that
humans could survive and to speed things up or slow them down depending on your point of view.
Before the flood man lived hundreds of years Methusalah was in his 900's.
The flood brought about atmospheric changes to earth changing the lifespans and sizes of creatures.
None of this was a suprise to God. It was a plan. God knows the end from the begining.
So sit back and enjoy the ride.
I have known about the atmosperic changes since I was a little boy back in the 50's.
Today there are videos explaining them.
This fellow, Trey Smith, has the God progect with lots of information explaining the Flood, the nephalim and
climate changes due to the flood.
They are long videos. It takes time to get the information into your brain
or it takes time to reactivate the information that is already there.
https://www.youtube.com/watch?v=1zz8_MxcnzY&list=PLEA099CE59F0A0322
https://www.youtube.com/watch?v=lktmmd7YnD8