Learning about crossovers helped convert me from atheist to a believer in God

Let’s see if this one survives.    

I have been an atheist for 50 years.  Recently I became a believer.  One factor that helped tip the scales is the “fine tuned universe” argument - the idea that the physics constants, e.g. the mass of an electron, are so finely “selected” that if they weren’t very close to what they are, life wouldn’t exist.  This is an argument for a creator.  The best counter argument seems to be that there are an infinite number of universes and we got lucky.  

When I got into audio, and started learning about crossovers, I was ASTOUNDED at how well the pieces fit together.  Octaves are exact doubles of frequency.  3dB describes so many seemingly unrelated phenomena.  But the one that really got me was the magic of capacitors and inductors.  They share no parts, other than wires sticking out at each end (usually), one acts due to voltage, one acts due to electromagnetism, one resists AC, one resists DC.  And yet, somehow, they are mirror images of each other, using almost exactly the same equations, behaving perfectly orthogonal to each other, even to the extent of how powerfully they perform their function (3dB again).  How is this possible?  Could this have happened due to random chance?  I smell a creator.