The "stupid fairy books" are effective because they offer a predictable plot and structure. They allow kids to build their endurance, learn plot prediction, and slowly build their reading vocabulary. While insipid and nauseating to the adults, they serve a very solid purpose for kids learning to read. I made my peace with them.

OP, I see absolutely no value in pushing a child to read before they're in school. All skills and interest wax and wane naturally as kids grow and develop. Follow the kid's lead.