The observation that the majority of scientists believe in God, whether or not it's accurate (though in this case it has been pointed out that it's not), is not interesting because the majority of the world believes in God. What would be interesting is if a greater percentage of scientists believed in God than the percentage of people overall who believed in God.
Roughly 75% of Americans believe in God. If, for example, 75% of American scientists believed in God, all that would demonstrate is that scientific literacy (or, in turn, most things that influence scientific literacy) does not influence religiosity. But in reality, as has been pointed out, the percentage of scientists who believe in God is far less than the percentage of Americans who believe in God, so that is very interesting.
For another example, if, hypothetically, roughly 75% of the American prison population convicted of violent crimes (e.g. assault, rape, murder) believed in God, that would not be interesting. If, hypothetically, far fewer than 75% of America's violent criminals believed in God, that would be interesting. But in reality, more than 99% of violent criminals in US prisons believe in God. And that's very interesting.