Why are there laws of physics at all?
Laws are what is left standing after one fixed rule has erased everything it can erase. The rule is repair, which moves two disagreeing readings held by neighboring observers to their midpoint. Whatever survives every repair is what physics calls a law. A disturbance spread across the eleven directions of a patch is erased in every band except the slowest, which is three wide, so space has three dimensions. A total no repair can change is a conserved charge. A twist in a loop that no repair can undo is a particle. A write that survives every comparison is a fact. None of these was designed. The rule itself never changes, because everything in the world is something it is doing.
This answer comes from OPH, Observer Patch Holography. OPH is a rigorous, consistent and complete description of the unified, self-creating computational Universe we inhabit. Its consistency is machine-checked: the fixed point at its core is constructed explicitly, and a theory with a model contains no contradiction.
To understand OPH and check every step yourself, start with the free book Reverse Engineering Reality. It builds the theory from the ground up, and the OPH Notebook answers your questions while you read.
read the free bookask the notebookor ask sage:read chapter 36: Why These Laws and Not Others?watch a universe make its own particles