True. This is the basic problem with trying to apply the razor in any shape or form: it doesn't actually simplify things (yet).
M theory still doesn't explain why there is matter or energy in the first place. M theory is great at explaining how the universe came to be as it is, in the same way the Goldilocks zone is great for explaining why we came to inhabit Earth and not Venus. But then the question remains "how did M-verse" come into being? Where did that stuff come from?
Then again neither does any theology deign to explain where their first thingies/beings/causes come from. For instance Christianity is pretty good at explaining how the universe came into being, in principle: "because God made it". Unfortunately it doesn't explain why there is a God, how God came into being, what God is made of, what the universe was made of/how God made the stuff he needed to make the universe, or even how God made the universe with that stuff.
So in the one case you rephrase the question in a "higher order", more general form (M-theory); in the other you simply add yet another inexplicable "term" to the "equation" and the equation still does not answer the key question of "why". That is, working backwards, you cannot explain why creation ended up the way it is, purely because you cannot explain yet why the universe is how it is. M theory can at least do that, but it adds the big presumption that other universes are likely to exist and also does not explain why any universe should exist at all.
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