Such a question is absurd. Not all questions or values which human beings find worth pursuing and committing themselves to can be approached scientifically. There can be no doubt that scientific theories fulfil a vital human need. But so do non-scientific theories, whether they be in the field of cosmology or religion, art, morality, knowledge or even science. Also, all scientific and some non-scientific theories attempt to make sense out of the phenomena they are put forth to explain.
Some metaphysical theories attempt to make sense out of all things which exist.
Other non-scientific theories are less ambitious and attempt to make sense out of a single area of human experience, e.g., aesthetic or moral experience. A good theory, regardless of whether it is scientific or not, must be sensible. But just how sensible a theory is depends upon the field in which it is offered and upon current knowledge, beliefs and values of those studying the subject. Generally, the best non-scientific theories provide a sense of value and significant meaning to the phenomena they explain or prescribe for. To some extent, all theories are personal.