Except that one can care about anything related to politics without voting. The one actually has nothing to do with the other.
Think about it this way: sub-teens and infants had absolutely no say on whether or not they were injected with the experimental mRNA COVID vaccine which not only did NOT prevent getting COVID but came packed with horrific side-effects that can last a life-time. But we should decree that they can never have any strong feelings or opinions regarding what happened to them because they had no input at the time?