Voting for someone who can't win is not voting for your values, and is as ineffective for conseratism as voting for a Liberal who can. I think the concept is clear.
The concept is only clear if you buy into your line that he “can’t win”. You present an assumption as fact and that makes the base of your argument unstable.
Today is not voting day and no votes have been cast. No debates have even taken place. Therfor a claim that he “can’t win” is nothing more than blind speculation.
Your premise is like a house of cards sitting on a unbalanced washing machine about to start it’s spin cycle.