The political parties system seems to only encourage this. Internal party topics and subjects just encourage this sort of down the rabbit hole effort to appeal to a smaller and smaller number of people to win a nomination....

But then in the outside world that isn't what the voters want / respect.

I see it time and again even with political parties I'm inclined to agree with. They show up even in general elections with slogans and somewhat corner case policies, attacks on their opponents, and ideas that really don't appeal to the masses. They seem to bamboozle even themselves unable to even recognize it at times.