But how some people want these 3 instead simply baffles me.
I'd say you don't understand the power of modern marketing and media.
Studies show that policies are a single-digit percent of determining votes, IIRC.
I don't mean just the candidate ads; I mean the larger 'media narratives' that take off for various reasons and reinforce who is 'electable'.
Look what happened to Howard Dean, the front runner, over the media coverage of one enthusiastic few seconds in a speech to young people - a non-issue.
That's not a typical example because it's so specific, but the larger messages over years matter. Obama was built up in the media.
This is why you should be concerned about the corporatism in elections - because it lets the interested groups select who is a viable candidate.
You will get someone who most people find acceptable - that's part of how they're selected and something money helps buy - but they will represent their donors.
It's really the end of real 'democracy', as much as we ever had it.
The people might think they're demanding a different type of candidate; but the only thing they'll get is one who appears to be what they're after, but has 'backing'.