The government provides it for poor and elderly adults and seems intent on providing it or medical insurance to everyone else. Parents educate their children, sometimes requiring them to do things they would rather not do. The government requires adults to send their children to school, if not a government-run school then an institution that satisfies the government's definition of school. Adults are not responsible. Adults don't know how to conduct themselves.
Adults are in fact children.
Needless to say, this is opposite to the classical liberal, or libertarian, philosophy, which recognizes adulthood and distinguishes it from childhood. Proponents of that philosophy understand that infantilization of adults is contradictory and problematic at many levels. Moreover, the advocates of democracy have a big problem in asserting that the state should take responsibility for the well-being of adults. The very premise of democracy is that adults are capable of making wise choices at the ballot box. This seems like a simple question that should have occurred to the paternalists at once.