@Skye cv,
You have a good enough point, I suppose. I guess a nice example would be universal health care. Ever see those commercials where all the kids say stuff about fixing health care? Something tells me they aren't talking about HSAs. However, looking at it objectively, it sucks, even though it sounds nice.
On the other hand, I think it's more complicated than that. I think a whole bunch of things factor in here. Kids rely mainly on their upbringing while adults have more real life experiences to shape their views. Also, they have to absorb a huge amount of liberal and Leftist information compared to a decade or two ago in schools and other places.
I think the main reason why I am not a liberal today, although I am even younger than missdixy, (I think) is because I became interested in politics at around age 11 and my views were pretty much fully formed by 12, before I had any liberal teachers or at least ones who could interject liberalism in more than small ways. So I was already prepared for liberalism when it came in school through teachers. And now, I am becoming more deeply entrenched in conservatism, and I doubt that anything or anyone in the future will bring me out of it, though there will surely be such people. But that's just me.