My point was that the "cosmological argument" is not really about "the cosmos" (the physical universe), it's about the nature of existence as we perceive and understand it. And about how what was 'before' caused what came 'after' which causes what comes 'next'. Which does then beg the question; what was before "before"? What came first?
To put it in terms of physics, the question would be where did the 'rules' that governed the way energy could and could not behave in the 'big bang' come from?
Why do rules need a cause?