Alright, by analogy: you understand how a properly functioning economy has positive effects for participants in the stock market, right? Economic growth means investors win. Do you understand that a properly functioning stock market also helps the broader economy, even if we assume that each participant in the market is just trying to manipulate the market into serving their own selfish interests? The market converges on more efficient allocation of capital than other sorts of non-market capital allocation schemes we have tried.

Google's tremendous expertise with algorithms is one reason why the experience of searching the Internet generally does not suck. The input people create to rank on Google is another reason. Good, descriptive titles are the single easiest on-page way to influence rankings on leaf pages -- they're also the single easiest way for an engine to tell what a page is about without linking signals. Thus, the practice of putting titles on pages improves the index. What's the first thing your SEO consultant is going to do? Look at your title tags. Systemwide, this converges on an Internet where most pages that people actually end up seeing have good, descriptive titles.