“Ever heard of God? You know, otherwise called the Almighty? The One who created the world and everything in it? I think He could probably manage those other problems.”
If that’s the case, he probably should have worked out a solution that didn’t involve killing all life on earth with the exception of the population of one big boat.
The reason he didn’t insert himself in another means and won’t for the future is that he believes in free will - the ability of humans to determine their own fate. He wants us to choose the correct path, but leaves it to us to make the decision. Early in the process he determined the need to be more determinitive, but has since offered other options.
He has the right to give life and to take it.
Yeah, I know, your atheistic beliefs are well known here. You're another one who isn't interested in answers. You think you have them all.
Good luck with that.