Corruption is on a scale. Some corruption is worse than others.

Some evils are less bad than others.

Some liars lie less deeply.

Being punched is bad, but it's worse to be shot.

It is attitudes like yours that are largely responsible for our system having poor choices. As long as power flows from voters, those who seek power have to do something to sway voters. If voters care about truth, lack of evil, lack of corruption, and they have the ability to discern differences therein, the more truthful, less evil, less corrupt politicians win. You fix the system.

But when you can convince the public that there's no point playing, every lie and every liar is as bad as any other, there is no limit to the pathology that the system can develop.

Up until the point where those in power need not even get the acquiescence of as-manipulated-as-they-can-be voters, there is an incremental way to turn things around: you play.

Not playing hands the power to the dishonest and authoritarian-minded and those they can most easily sway.

The attitude you express is the primary source of the problem. Democracy requires you to play, or it's lost.

So play. Or admit you're too lazy or disheartened. But it's not a principled position.