All of these universal laws and components that JUST HAPPEN to be perfect, need to be answered for.
You offer one explanation: Many, many attempts.
There is another (at least): only one possible outcome. If you lottery can only pick the number 42 then it is easy to explain why that is the one picked.
We don't know if any other universes are possible. Maybe, indeed, "there can be only one".
It maybe that the answer lies somewhere in between. There may be a small number of possible sets of physical laws and constants. It maybe that all of them can produce somesort of life (just not life that is exactly like us but so what?).
We can all conjecture all we want. What we have is an unanswered question. That is all if is. It doesn't tell us anything at all about the universe or it's cause. It is JUST an unanswered question.