You sound like the perfect candidate for philosophy! The sort of questions you are asking, e.g. 'what is the point?', are exactly the sort of questions I'm studying in one of my philosophy modules, 'Introduction to Scientific Inquiry'. In this module, we ask questions like: what can science tell us about the 'real' world? Can we only use empirical data to base theories on, or can we hypothesise about unobservable entities? Can we use 'concept-terms' like 'force' and 'attraction' freely, or do we need fundamental causal explanations for such terms in order to use them in our scientific theories? And there are many other interesting modules in which similarly abstract questions are asked about the fundamentals of the world (metaphysics, epistemology, philosophy of mind etc.). It's a fascinating subject and sounds like just your sort of thing (plus, since it's very analytical, uses logic and is based on problem-solving, it has a range of those 'transferable skills' that employers look for in a range of careers). I recommend you look into it ^_^