Because In many state you are beholden to large swaths of Rural land and the representatives they send to the statehouse. Those reps can be swayed (bought). Lucky for Ohio they were able to use their constitution to protect themselves. Ballot initiatives can give the people a voice on pressing matters… As in Ohio, The Reps were trying to take away the voice of the majority of the state voters. They lost and I expect they will brought to heel by the will of the people of Ohio in November. State constitutions are a check against legislative power. No wonder the R’s don’t like that. They want to rule, not represent.