Parents don't owe their children a college education. They all look at it differently. Some have no choice; they simply cannot afford it. That was my parents. They love me. I love them. End of story. For those who can afford and choose to put conditions on it, or who think they child will grow more by having to work his/her way through school, they probably have good intentions whether the rest of us agree with them or not.
If they can afford it, they do. If the kid wastes the opportunity and drops out or gets kicked out, that's something the kid will have to deal with.