As ancientgreece.com says, "The Greek theatre history began with festivals honoring their gods. A god, Dionysus, was honored with a festival called by "City Dionysia". In Athens, during this festival, men used to perform songs to welcome Dionysus. Plays were only presented at City Dionysia festival." History always inpacts places around the world, including the west.
No.
there really isn't an excuse to why anybody isn't treated or seen as an equal. Everybody is and should be treated an equal. In back then, if you're going to create equality and speak equality you should probably practice what you preach.