Luck does not allow you to experience the great pleasure of contemplating the nature of reality and our place in the cosmos, it, at best, allows you to guess the right answer on a pointless multiple choice question.
More importantly, while luck "could" theoretically do anything, it may be a lot more difficult to accomplish through luck rather than another attribute. For example, just randomly throwing electronic parts together could theoretically end up as a fully functioning computer, but that requires insane amounts of luck, whereas the knowledge of how to build one is far easier to achieve.
Similarly, you might hope that, by some random whim of entropic forces, all the particles around your enemy happen to pass their energy onto him all at the same time, causing his blood to boil or his body to burst into flames. But it's much easier to just punch him in the face.
Just like intelligence doesn't give you omniscience, luck probably doesn't give you "everything that can happen WILL go your way", it's just more likely to work out. Great supporting skill, but if you simply don't have the means to get a somewhat reasonable chance to succeed, luck is unlikely to change it.