Experience exists. Whether the contents of the experience are "real" or "not real", it is not coherent to claim that there is truly nothing at all -- what could even cause one to come to that conclusion if there's nothing at all? Platonism is one of the few (only?) games in town in terms of potential ability to furnish answers here (a Popperian scientific method has well-defined boundaries on the scope of explanatory power) -- and the more indications we get that physics can be derived from number theory and combinatorics, the more seriously I think it will be taken as a research topic. A more formally developed Platonism would also potentially be able to address the "something rather than nothing" question.
Why do you think "something rather than nothing" question doesn't make sense?
Why do you think "something rather than nothing" question doesn't make sense?