Why does it matter so much to atheists that God doesn't exist?

I am speaking to the US Bible thumpers here, of course ~ many of whom are flat-earthers who deny evolution and see scientists as evil people who are constantly trying, and succeeding, in disproving their beliefs one by one.

Notice that I said their rules, not any gods rules.

A belief in a god is not the problem.

Do you have pics of the wife making out with another guy?

And then use and ENJOY these fantastic scientific advancements every single day of your life?

Because these are not any gods rules we are talking about.

These are man made rules - made thousands of years ago for the use of the humans who lived thousands of years ago.

While wearing high heels and walking heel to toe, when the toe box hit the floor there is a noise. How do I keep the noise just for the heel?

Those rules that you are trying to reinstate are rules made by men who didn't know anything about the earth, nor anything about all of the other inhabitants of it. How can you not see that?

THE BIBLE IS THE PROBLEM!

I do not personally care if you believe in a god or not.

What can I say to a scammer who thinks he loves me, but I don't want to be scammed?

And how do you deny hundreds of years of advancement in all fields of science?

IT does not matter, mainly because it does not exist.

My problem is that people who try to shove their rules down everyone's throats - including by physical force - DO EXIST .

What have I done wrong? How can I start over?

The people of the modern world have evolved past all of that nonsense.