Shhhh! Yes, spending any time at all to vote in races bigger than local ones is irrational and you can skip it without affecting the world in any way whatsoever

Shhhh! Yes, spending any time at all to vote in races bigger than local ones is irrational and you can skip it without affecting the world in any way whatsoever aside from saving yourself some time, but you're not supposed to tell people that, especially if they might vote for a candidate you prefer! That might affect the election.