lesser evil voting is not a democratic ideal.
Neither is staying home and not voting at all.
If you can’t abstain then you don’t have a democracy. (Yes Australia i’m looking at you) You have a system of coerced consent where the political parties wouldn’t even know how to change, but that’s okay because there’s no incentive to change in such a system either.
It’s literally the fastest way to get Party AB instead of Party A and Party B.
Great you started with the conclusion that not voting is fine and then tried to find a way to justify it. You failed.
I’m not going to write a 20 page paper for you. This is what it is. If people have to vote then the sitting parties have no reason to respond to voters.
Then people could abstain by writing in someone else. Not voting is a serious problem.