Once the political climate is polarized enough, choosing to not engage in the discussion about how evil the other team is will get you lumped right in, because if the other team really is evil and you don't care, then you must be pretty bad yourself.
The "Oh, but it's your civic duty to improve your community/state/nation (which obviously means voting the way I want you to, not the way the other half the country wants you to)" tries to frame political engagement as some moral good, but if they redirected the time and energy from political engagement to working at McDonalds and funding charity with the paycheck they would have 1000x the impact, even if you assume there is a Good and Evil team and they are on the Good team.