Yes, some people go because they want to expand their horizons, learn more about the world, network, make friends. However most people go to be able to eventually get a job.
I attended a supposed liberal arts school and was NEVER informed of such goals or anything in the proximity. In addition, never did I feel that my schooling was geared towards or assisted in much of that.
Interesting you say that. Around here, the for-profit colleges and cook schools and whatnot all have fine print in their TV ads that say "XYZ School does not guarantee a job or job placement."