I've always been puzzled by that aspect of Wicca. If you try to train in ceremonial magic (or magick) it involves great effort: it was certainly too much for me! Yet the books give the impression that within a year of joining a coven, you're casting real spells. In the other hand, if you're just praying, why would the gods expect you to have all that paraphernalia?
I'm not Christian or Wiccan but as far as magic there is a whole lot going on that does take time to experience and understand... More esoteric things a book, website, post, etc. could only point towards at best.
When we look at the power of intent and will we can see how things influence it. Since we are interconnected as a foundation for most all pagan/nature-based traditions our environment effects our parts of inner self - there is a communion and relationship.
If only it was to get in the best possible mindset and fully channel our own and other power/energy it is reason enough but there is much, much more