The problem is how they define a better communication between mice. From an human point of view?

Normal male mice fight. You enter in my zone, I'll bite you and chase you off. Normal female mice are more tolerant with relatives and pups, but not with any other female. They can fight also with strange females.

This is the rule for the species and the definition of perfect and normal communication. "pacifist" or mesiah mice is anomalous and probably would send a really confusing message for the other mice.

"I'm too feverish and tired to fight right now, so let me alone" is common among animals and not necessarily related with autistic behaviour.