Bitcoin is built to be anonymous. It's probably not as anonymous as the "dark/non-transparent" cryptocurrencies due to its transparency and other reasons.
People need to understand that Anonymity (safe Anonymity) is part of their natural right and could be useful in keeping them safe from tyrants/evil. You don't handover the right to them in order to be accepted. The deal you make with them on the behalf of Bitcoin users must be fair for both parties (Network Participants/users and your opponents)

From the old Bitcoin 



It's most likely possible that satoshi allowed anonymity due to the safety of users in difficult societies, to help keep Bitcoin antifragile and difficult to attack successfully.