The argument I’ve heard is “It must stop somewhere, and whatever it stops at, we’ll call that god”. It’s not a good argument, because it then hopes that you conflate the Judeo-Christian deity with that label and make a whole bunch of assumptions.
It’s often paired with woo that falls down to simply asking “Why?”, such as “Nothing could possibly be simpler than my deity”
Can't we just talk about it without the maths? Guys? (mander.xyz)