The concept of causality breaks down when confronted with "nothing", I agree. But causality also breaks down in the face of well-understood and -researched phenomena like quantum mechanics. No, I'm not saying our everyday experience is anything like QM, that's nonsense in my opinion. I'm giving an example of an aspect of our world where causality is not the solid dependable corner stone we tend to think it is. To me, this means I want to question whether I'm not expecting too much of the "comes from" in "something comes from nothing". I'm sharing my massively speculative thoughts on this, not trying to invalidate yours.