String theory seems to presume that something is vibrating. I prefere to think that "something" is space and the so called dark matter which is, perhaps, clumpy and randomly traveling through it like a stone through water or air. Thus the collision or interaction of the the two matters result in the manifestation of the universe.
This allows for all of the currently discovered natural laws of motion and energy to be exhibited through the known univese. It allows for all of the unknown, unseen, and unrecognized forces as well.
I have no proof but the very concept of a string begs the conclusion of the string being composed of something else which then requires the explination of what that is.
The physical universe based on the notion of space and dark mater, which are the simplest components of the universe and don't actually require an explination because neither can be seen or measured, is the evidence of their existence. All things vibrate which leads me to the conclusion that the smallest entities are at work and the outcome is both the very large and the very small.