If rules can't 'just exist' how can the creator 'just exist'? While yes this is a repeated argument, it still stands, you can't say something can't just exist without saying how the thing that created exists.
Maybe there is a mystical being out there, maybe not. But I'm not going to write paragraph after paragraph explaining why something that has very little backing it up absolutely has to exists.
Let's not have the "Chicken or the Egg" discussion, but that basically is what it comes down to. Were there rules, or the rule maker first?
To me, "rules" are observations of how a system works and define what is the correct and incorrect order. When I say "observations", you have to remember that this comes from the "player perspective". We, humans, are all players. The world is one big game (see my pattern theory rants). And as we know, for every game, there is a designer who created the rules that allowed for the system to operate in the first place.
I know it sounds like troll logic, but basically I believe that while beings can exist without patterns and rules, there is no order. One thing I believe life is about is maintaining order (the "balance of the force", making sure that there's equal amounts of good and bad). The reason we exist is because something came and created the rules and patterns which form enough order for us to live.
That's a very chaotic way to explain what I believe in and I doubt it's going to change your mind much, but hopefully that at least answers your question to some degree.
Note: I can't answer the physics of how something comes into existence, and as I said before, I don't care. I'm discussing the spiritual/theoretical reasoning for why I believe there has to be something. I know barely anything on sciences relating to how life actually forms.