Simply proving a God or even creation doesn't change too much, many people already beleive in at least some sort of higher power.
Christianity is reportedly the most adhered to religion in the United States, with 65% of polled American adults identifying themselves as Christian in 2019. And, as you said, it doesn’t change too much. Many things about the country are pretty messed up. And many, many things about the people of our country...especially those who profess to be Christians...are pretty messed up as well.
