Governance Vs The Individual

Our life and liberty is on the balance as we determine whether the government or the individual is responsible. Most of us would agree that government’s main job is to protect their citizens against attack from others but how about our own self? We demand that individuals take a road test before they can drive a car so their less likely to hurt an individual yet also demand that they wear a seat belt to protect themselves.  Individuals aren’t permitted to kill themselves except when the state determines they can (ex terminal illness) yet should we forbidden to take extra large soda’s that slowly do this to our own body?  For me it’s simple you have a right to be stupid as long as that right doesn’t infringe on another’s life and/or liberty whether it be on soda or even seatbelt . Where do you draw your own rope?