Sound effects were originally created and recorded for Horror movies to give a more dramatic feel that will start to grab you attention for plays sound affects were mostly used to make the audience more interested in to what they were watching, Most sound affects now are mostly music especially in action movies or car racing movies to make it even more dramatic than it already it is can you imagine a movie or play without sound affects or movies it's pretty weird and in the early 1900 before there was no audio in movies "Silent films" they used sound affects and music so they won't bore the audience.
Maybe it's because not everyone can cope with each other after such a long time. Maybe not everyone has great social skills after living together for awhile.
