As for me, string theory is only an alternative geometric for space/time and therefore corporeals, cosmology, etc. - the great meaning is in the universals, an interpretation that everything is a mathematical structure which exists apart from space/time dimensionality (the Max Tegmark Level IV universe, radical mathematical Platonism).
From that perspective, everything physical (and perhaps non-physical as well) - including the geometry and string vibration, fields, waves, particles, properties, organisms, etc. - actually exists in elegant simplicity which (at this time) is beyond our grasp from within a 4D (visual, mental limitation).
Reification of mathematics. The map is not the territory. Mathematics is a map and does not "exist apart from space/time dimensionality" (or apart from the mind of man, for that matter.) If it did it wouldn't matter anyway because, by definition, we could never know that. Such radical Platonism would be unknown and unknowable.