Actually, it does....any living creature found on planet Earth is from the same original "ancestor" if you go far enough back along the evolutionary chain. That we are more similar the closer the branch, is just common sense.
As for mice? Well, we've obviously come a long way since we diverged about 75 million years ago from a small, furry common ancestor.
We already know primates took the unique evolutionary path of enhanced cognition as a solution to life’s challenges. The human branch of the primate lineage merely exploited this strategy to the extreme.
We also know the mouse lineage took a very different turn, evolving efficient strategies for feeding, hiding and, most of all, producing prodigious numbers of offspring.