Why not vote for a third party candidate?
Rather than debating the reality or validity of
binary choices, perhaps an example would better clarify the situation:
What if, e.g.,
3rd-party candidate Evan McMullin (sp.?), an 11-year veteran of the CIA, but a self-professed "constitutional conservative", is able to leverage the "principled conservative" voters he targets in Mountain-West states, into winning 1 or more of them, e.g., Utah, with its
6 electoral votes?
Do you think that he would be depriving the Democrat nominee of votes in the Mormon homeland?  Or would he be depriving the Republican nominee, especially this election's antiëstablishment nominee, who's made promises more conservative than the Republican establishment's past
losing candidates have dared to make?  If you grant any credence to current reporting of professional polling, which nominee do you expect would feel that deprivation most keenly?  For which nominee might it make the difference between squeezing out a surprise national victory in this unusually crucial election, or barely losing, but--having mentioned
binary choices--losing all the same?  Hmmm?