In most civil societies we don't expect children to "work hard" or "be ambitious and strive to better themselves and their family" in order to obtain a high school education. Most compassionate humans feel that a child shouldn't be punished for the sins or omissions of their parents, and even those who aren't compassionate realize that society works better when children's education is provided free of charge to those children with the cost paid for by society as opposed to leaving them no ability to contribute to society. If that's "socialism" to you and you think it's a bad thing, then it says a lot about you. Highly recommend you read a little Hobbes and understand the importance of the social contract to human civilization, without it life is "solitary, poor, nasty, brutish and short".
BTW, calling someone a "dumb ass" followed up by "No wonder you say such stupid shit." is absolutely not a "perfectly valid comment", it contains no content of value and significantly diminishes the level of the conversation, at least to those of us who have graduated from said "free" high schools. It was that comment I was referring to in my post quoting him, not yours, just so that's clear.
However it was WeToddDid2 who missed the entire point of the conversation, which was centered around if college should be free from the point of view of if the student pays tuition, and Frederick Foresight correctly pointed out that high school is currently free in that the student doesn't pay tuition. To be pedantic perhaps he should have spelled that out word by word, but again most people with a high school education would understand that this is what he meant. No one ever asserted that it is cost free to run a high school, that would be absurd. We all fully understand that teachers don't work for free and buildings don't build themselves and local property taxes pay for high schools, and there are no such thing as unicorns, the Easter Bunny, or Santa Clause. We just happen to think that's a good thing, and you apparently think it isn't. Could high schools be run much more efficiently and effectively? Absolutely. That isn't reason in most people's mind to get rid of them!