Most people do not need that level of privacy most of the time.  Many people would like more privacy for a lot of silly things (like the inflatable woman).  There are also a lot of illegal activities for which it makes sense to seek privacy.

To most people I would suggest that the only attraction of Bitcoin is the potetntially lower transaction fees.  When you consider only those that already use Bitcoin I expect you'll find a larger proportion which highly value freedom and/or privacy.  If all of the things you want to do are either legal or carry a low probability of a mild penalty then you are lucky indeed, particularly if, by some miracle, you were born into the country with these ideal laws!