Take it seriously as opposed to what though?
As oposed to not taking it seriously - that is, not believing it.
The answer of course is what you do take seriously or at least take for granted which is God Free. Since that then is your position what reasons/evidence or argument can you give?
The total lack of any reasonable definition of any god(s) and an associated reason to take it seriously, is all the reason I need not believe in any notion of god(s). I can do this without claiming that I
know that there is no reasonable definition of some god that actually exists.
This is exactly what everybody does with fantastical stories or any other claims for that matter, such as a new particle or force, or anything else. You can't put all the thousands of god-ideas into some special category that requires people to need a reason
not to accept them. They all
individually stand or fall entirely on how well they can be justified.
The questions "do you believe in god?" or "do you believe in god-free?" are meaningless anyway, without an associated definition of the relevant god. I can, for example, conclude that reality
does not contain the god that created the universe 6000 years ago in six literal 24 hour days - because there is good evidence that this did not happen. With respect to that god-idea, I
do positively believe in god-free.