Why should it be important to Atheist who do not believe in a God or Gods?
Atheist don't claim absolute knowledge that there is no God, we don't believe there is due to lace of evidence, and most do not care to speculate if there is one, much less insist that this is how God operates,...should we choose to do so,...its always hypothetical and nothing more. In fact most Atheist are comfortable with not knowing, so therefore your statement ...'we just don't know how certain things are done' fits very well with Atheists.
This is a general paradigm. Academia of any field is NOT that humble that it would suggest in real-time (non public) that the particular field, research, and study are NOT arbiters of truth for that repective field. This is regardless of conditionals.
So, it is good for everyone to realize we do NOT know nearly as much as we think we do - and actually put it into practice.
This treating of respective fields as the arbiters of truth, or at the very least THE (definite article) framework of reality is sophomoric, and myopic.
We don't do this? Of course we do. Academia, and humans in general are full of ego. Tell someone you don't quite believe humans cause global warming: it won't matter that person''s credentials because the status quo is to tell the person s/he is wrong, and that the evidence for AWG is massive. This is, of course coming from humans who don't even know what is in 5% of their own planet's ocean - yet we are fully confident (confident enough to scoff) in our "ability" to extrapolate data on a dynamic system that has existence almost as long as the universe. I would say the big bang is another example of a paradigm that is "frozen-in" status quo. But, clearly if we are arrogant to believe we know with significant accuracy and precision the events that will happen on our planet (despite our abysmal understanding of our own ecosystems in isolation, let alone working as a unit called Earth,) then we are arrogant enough to think we know about the universe we had no hand in creating.
And, we do this all the time - substantiating our marginal understanding of the observable world we call the practice of science with our own academic prejudices. Ego feeding ego; it isn't new, the age is just different.
If EVERYONE realized this - that in the end even algebra and field theory are abstract at the foundation, then education and technological advancement would take a larger step toward the pure, and complete. But, we won't do this.
It is really a separate issue from God in that we are "massaging" our egos thinking we - literal rotting sacks of flesh - can believe we know enough about the worlds around us that we can scoff, shame and ridicule other ideas. That is a fatal flaw.
We think we have progressed, but when we look at how the hegemony of academia treated novel ideas and theories (some of which were spot on,) we should realize we are devolving, and degenerate compared to where we could be if academia was treated as its field father: philosophy. Instead, we have convinced ourselves that only a few people with certain pedigrees have the authority, and should have the audacity, to meaningfully contribute to any academic subject.
Meanwhile, space-age technology is being developed by the people who actually understand this, and work toward advancement treating science as philosophy (though, those groups throughout history have had "help".)