Congratulations, now you understand the modern economy.
Anyway, keep in mind that the modern mice cost up to about 100 USD, modern USD is worth next to nothing in actuality, and it has to cover marketing, customer service and R&D expenses. Yes, R&D. The modern tracking systems aren't simple, and pushing limits adds complexity. That's why firmware updates, if there are bugs or tracking isn't convenient (e.g., too high LOD). It's the same story as with storage—it's just storage, isn't it? Actually, you can run an ordinary OS (like Linux) straight in modern HDDs.
I doubt there's market for simple, high-quality mice currently. Simple mice used especially by businesses are cheap to replace, thus there isn't demand for quality, and individuals (are tricked to) favor features—but at limited budget. If you want a reliable pointing device, look elsewhere (industrial trackballs in particular).