How come that a public library, one of the earliest examples of centralized information infrastructure, is not an example of outsourcing and relinquishing control? Instead of your own (small) books collection you get to use some external (huge) book collection. But now you only can borrow a physical book, or some recorded media. You have to return it, and making a copy for personal use only is still a bit problematic.
Either you own and control something, or you do not, there's no third option. A best, you can outsource your stuff piecewise: run your own software on a cloud VM, or bring your own furniture into a rented apartment, or give a valet the keys to the car you own for parking, etc. But there's always some relinquishing of control in exchange to some other aspect of efficiency / comfort.
It's also easy to mistake what most people want for what everyone wants, and miss an important market.