jrc,
Math has to be taken in context. Epicycles really were brilliant math and likely contributed significantly to geometry, but the crystalline spheres, as a one to one physical correspondence, were lousy physics and that one to one correspondence is back in vogue today. Spacetime is assumed to be a one to one physical correspondence with the math of Relativity. Math is mapping and modeling, yet some(many) buy into the notion it is somehow "reading the mind of God," as the basis of reality, not a mapping of our perceptions of it.
Your question really has two parts; Why is there anything? And; Why is there what there is?
I can make some conceptual observations about the first, such as it is feedback between processes and the pattern arising from these processes. For example, life is a process, individual organisms are the patterns arising. Process goes past to future, while the particular patterns go future to past.
The second question requires far more examination of these processes and patterns and that requires a lifetime of dedication and in the company of others.
I don't claim to be a scientist. I just think the science ought to be able to answer basic questions, such as whether time is truly a dimension, aka "duration," along which the events exist and our position is subjective, or is it the dynamic of these events rising and falling?
Or how can one argue that "space" expands, when both the evidence and the logic assume this expansion is still relative to a static speed of light? REDSHIFT!!! Hello? That makes the speed the denominator!!!
How can you build complex conceptual structures on such logical mush and expect the result not to be more complex mush. GIGO.
I give credit, where credit is due.