While not everyone feels they need privacy in their currency, imagine your friends and family being able to go over your credit card statements whenever they felt like it. Send your friends or family cash via crypto (if that seems unusual, imagine how weird the idea of using venmo and google wallet to send your friends money would have sounded in 2010) it would just take a little curiosity on their part to look up your publik key and see what you're up to. You don't need to be a criminal to appreciate privacy.

Regardless of your stance on criminality vs personal liberty, think of all the people and businesses who prefer to deal in cash, from drug dealers to roofers. They don't prefer cash because it's safer than credit or checks, they prefer it because it's more anonymous. No matter your stance on the ethics of their practices, they are a large part of economies around the globe, and their preference for private payment methods create market pressure to encourage growth of private systems over comparable non private ones.

Think of every time we've had leaks about product activities or operations about companies that resulted from someone analyzing payments. I'm sure companies like Apple would love to be able to pay vendors and manufacturers developing and working on new products privately.