About roads, and mobile phones, and the internet. Looking further afield, confidentiality in finance is generally considered a good thing but has enabled many of the world's worst dictators. The US government has installed or propped up many of those dictators in the name of principles that were (at least by some) considered good at the time. Some people think unlimited access to guns is a good thing, but there have been some debates recently about the consequences of that. Killers use many services. So do police. Blanket assertions about whether the provider of a given service is good or bad are worth a lot less than analyses of what they might do - or be allowed to do - that would have shifted the balance.