Yep, I love Atomz too. But also, search is an important site navigation feature. It's certainly good to have things structured well, but some people (rightly or wrongly) don't think like you. Personally, I would only typically click two or three link before opting to search instead. When I strike a site with no search functionality I look everywhere thinking it must be around here somewhere.... Also, while a page may have a primary topic, it may also address secondary topics. A categorisation would disregard these, a search would find them.