Why are actors called "inferior"

Because the ninth stream is a low deductive level, the meaning of the next ninth stream is not inflow. The "nine streams" are: one Buddha, two immortals, three sages, four officials, five ministers, six phases, seven monks, eight roads and nine venues. The middle nine streams are: one storytelling, two doctors, three divination (fortune telling), four chess players (chess players), five painters (painters), six officials (ranks), seven horizontal (lobbyists), eight righteous (chivalrous) and nine fishing. The next nine streams are: one (singing opera), two blows (drummers), three circuses, four haircuts (haircuts), five pools (opening bathhouses), six back rubs, seven pedicures (pedicures), eight matches (breeding) and nine prostitutes.