They do many many useful things and the utility is valuable enough to begrudgingly have to accept the frustrating experience of using them. We generally really do have to accept it as well because as with all useful technologies, they become ubiquitous and then useful technologies are built off the fact of their reliable ubiquity and then those technologies replace existing ones and you find yourself needing smartphones to get by in society. They’re close to a necessity if not in reality, a necessity where I live, but places like China for example it is simply impossible to go about life without one. I honestly don’t what people do there when their phone is broken, just getting out the door to pick up a new one would be a challenge.