The animating concept behind the Trump campaign will be chaos. This is what history shows us fascists do when given the chance to participate in democratic political campaigns: They create chaos. They do it because chaos works to their advantage. They revel in it, because they can see how profoundly chaos unnerves democratic-republicans—everyone, that is, whether liberal or conservative, who believes in the basic idea of a representative government that is built around neutral rules. Fascism exists to pulverize neutral rules.
So they campaign with explicit intention to instill a sense of chaos. And then comes the topper: They have the audacity to insist that the only solution to the chaos—that they themselves have either grossly exaggerated or in some cases created!—is to vote for them: “You see, there is nothing but chaos afoot, and only we can restore order!”
This only holds when the respective parties are roughly evenly tied with one another and the two major parties have the marginally more-popular candidates.
In a state where one party or the other is an overwhelming favorite to win, this math doesn’t matter. In a state where both parties have put up a shit candidate (say, you’re in Arizona or West Virginia and being asked to support Kristen Sinema or Joe Manchin yet again), a third party vote is the only way to clear the deck of deplorable alternatives. If you’re in Nebraska and the popular frontrunner is the indie union activist Dan Osbourn you would be foolish to vote party line as that’s effectively a vote for Deb Fischer.
No, it holds regardless. Your argument is the same as saying there’s no point in voting if you don’t win.
Your real problem is as I said, Primary Elections, where we have EXCEPTIONALLY terrible voter turnout. The primaries are where you choose your party representatives. If you are complaining about the General election, the fight was already lost.