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

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

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.

Banking data reveals early warning signs of cognitive decline in older adults - Medical Xpress

IT does not matter, mainly because it does not 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.

THE BIBLE IS THE PROBLEM!

When an Air India flight crashed into a medical campus, surviving doctors rushed to save lives - Politico

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

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

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

Which current F1 drivers should switch teams based on historical patterns?

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

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

What was the most inappropriate thing your parent caught you doing as a teen? Was in the bedroom, I thought nobody else was home. My sister and I shared that bedroom but I knew she was gone. I didn’t know my dad was home though.

A belief in a god is not the problem.