Because while I have some strong views on classical liberalism, I'm neither right nor left. And in particular, I dislike populism, right or left. And then there's the shortage of sane candidates and well, f'it..
I'm not an ideologue, but I've lived through more than a half century of the "mixed economy." The GOP and its minions have pushed me from center to a position darker than pink. That doesn't mean I'd impose an ideology on the country, though, if I were elected. It means that I think some leftward shift is a remedy for where the Right is trying to take us.
And I think that latter direction is moving the country to its own destruction. A Soviet leader once said in a public statement "We will bury you." This was interpreted by alarmists as a military threat. In fact, what he meant, if you want to understand their own basic dogma of that era, was that we'd destroy ourselves, and they'd have to get the shovels and the undertaker.
Otherwise, I don't want someone in the Oval Office whose every sentence begins with "I," who rants about how great he is, who goes off on stories about aerosols versus pumps, who fries bacon on his AR-15, whose governor's staff tried to use governance to punish a town full of people, or who just happens to be related to the asshole who caused the whole middle east to unravel. Should I continue? Maybe with another line.
I want to say to the entire GOP, what Maximus said to Commodus in the arena of "Gladiator": "Your time for honoring yourself will soon end."