Why? Because most services which accepts bitcoin now are not asking about my name, address or credit card number.
In addition I am sure that no one will hack their data base and steal my personal data, credit card and use it later.
Is that enough?
No. I think that is not enough for OP.

Maybe some people are always expecting for something more and doesn't appreciate what's already there. They can't get contented easily.
Well that is enough for most people because you don't have to get the identity of the person who you are going to transact and that's why I can say that customer would really be encourage to use with bitcoins. And about the security, we can surely safe that the blockchain technology is really safe, but not the bitcoin wallet provider.
Bitcoin transactions are risky if you are dealing with an unknown person so we should be very careful while buying and selling stuffs with an individual and its always good to go with escrow.