Having a modern day smartphone is a choice. You are not required to have one. If you don't want one, don't own one. It will certainly save on your monthly utilities bill to not be paying for one.
Many people find these phones to make our lives easier and don't believe all the FUD (fear, uncertainty and doubt) and hype about how intrusive they are. With a little bit of knowledge, some of us have used these phones to make our lives fuller and more social.