If we act as customers and not owners of this system we will continue to be subject to the whims of the owners(the voters). Groups that are smart benefit all the time from voting. In California, the conservative minority organized, built coalitions with other "minorities" and collectively became the majority and got their person in office. Now that person is doing exactly what they wanted him to do. He's extorting Indian reservations and using their single resource-casinoes to bankroll California's budget. He's asking for a quarter of what they make and they aren't even citizens of the US. He's taxing a sovereign nation.
That's the power of a minority that organized. And part of that organizing started with the vote.
Voting is absolutely necessary for political influence. But it's only the first step and single element of political empowerment.