You can’t lose a vote you aren’t even in the running for. That’s like writing in Charlie Brown and then saying you lost the vote. You didn’t; you just didn’t cast a meaningful vote for President. You’re changing nothing. You’re not moving the Overton window even a hair to the left. You’re just sitting on the sidelines.
But you know if you give zero shits about the presidency and just want to vote in local races, that’s fair, I suppose.