I never said they did. That's precisely why I'm arguing that "no gods exist" is NOT a scientific conclusion.
Either gods exist or they don't. Agreed? A or Not-A. And whether A or Not-A is the true state of being is independent of whether we think the correct answer is A or Not-A. Is that agreed? Having no evidence for A is not the same thing as having evidence for Not-A. Is that agreed?
And yes, if gods interacted with reality then science --if you could devise the right experiment or observation method -- could investigate. But I have yet to see anybody's proposed experiment on how to determine if gods exist or not. So far all we've got is "we came up with alternate explanations for certain phenomena once claimed to be caused by gods", which is not in any way to my mind an experiment at all, much less a conclusive one.