Maybe because:
1. They can afford it easier.
2. They should put back what they take out of society.
I can see your point with number 2. That is probably the only good argument I have ever heard for progressive taxation.
Yeah, I'm sure. Most libertarians are either in college or just finished. I was a libertarian back then too.
Why the change of heart?
Again, perhaps if you BOTHERED to give us your idea of what is different between libertarianism and anarcho-capitalism, I could take this comment of yours more seriously.
fair enough:
Anarcho-capitalism: No government, all usual government services such as police protection, national defence and the courts are placed in private hands.
Libertarianism (of the minarchist type at least): Government exists only protect individuals from aggression. In reality though many libertarians will support some government actions which are outside this limited scope, commonly things like the maintanence of roads.
Children, the elderly, the unintelligent, the disabled, etc.
Well, under no government is a child going to be an astronaut before they grow up, nor is a 70 year old man going to be the world heavy-weight boxing champ, nor is Dubya going to understand quantum physics, nor is a man paralysed from the neck down going to get up and run a marathon. There are some natural limitations in the world obviously and no government can change that.
Besides, we aren't all going to be a nation of 300 million millionaires. Someone is going to clean toilets for a living and they shouldn't be punished for it by not having health care or being unable to get by.
What makes you assume everyone wants to be a millionare? I sure as hell don't. It would take far too long to earn that kind of money that is time I would rather spend with my partner or maybe drawing or learning things.
That aside, I agree that insurance in America is too expensive. I just don't think public healthcare is the only solution nor the best solution.