But again either we question why stuff of a certain type invariably does and is....and not something else or we just resign ourself to saying the universe just does what it does as someonehas already resorted to in this thread.
The point you keep on ignoring is that if we decide to "explain" why stuff does what it does with rules that have an existence apart from the universe and a rule maker that decided what they were going to be, you haven't actually explained anything because there is no logical reason to then not ask the same question about the rule maker. Why does it exist and do as it does and not something else?
You've got to the conclusion you like and then arbitrarily stopped asking questions. Just slapping the label "necessary" on it, is equally arbitrary. How can you tell that the universe (as a whole) isn't necessary but some rule maker would be?
As things stand, you've just added the stuff you like without any hint of justification.