Why is anonymity (did I spell that right?) so important? If you're not doing anything illegal or some kind of perv, then why would you care if people can track your purchases?
Privacy is critical for the proper operation of the Bitcoin system because all account balances are public. If we cannot maintain privacy then Bitcoin will fail. Would you keep your money in a bank where anyone in the world can simply look up your balance online? Would anyone run a business using a bank where anyone, even competitors, can look up their current balance and see all of their income and expenses anytime they want to?
Nobody will use Bitcoin without privacy protections.
Anonymity is a different but related concept.