Why do people call Wicca a "nature based" religion--what could be more Natural than Christianity?

With our beaultiful stained gl windows, and glittering, guilded, painted plaster saints, we perfectly recreate what nature has given us inside a heated building for everyone to enjoy--we naturally rote-memorize rituals and proceeedings, just like wiccans have rituals, and enjoy the ease and convenience of processed unlavened bread--which contains no unnatural additives, like yeast!