Why does the Qu'ran say that Muslims may beat their wives lightly? surah 4:34?

B/c (Muslims and liberals, say it with me) : "WOMEN ARE GARBAGE" . Why else would a perfect God or a peaceful people believe that it's OK to beat women ? Yes, women are garbage. I mean, it must be true or liberals wouldn't constantly defend Islam as a wonderful but misunderstood religion. And it must be true or so many Muslims (whom liberals have already proven to be wonderful people by calling critics of Muslims and of Islam 'racists' all the time) wouldn't support it. Muslims support Islam. Islam supports beating your wife. Therefore, by the transitive property, Muslims support beating their wives. If 'peaceful' Muslims want to put out the 'new and improved Koran' with 50% less evil, that'd be great.