There are better "Thought Experiments" to occupy your mind but try this. First of all, education is not "Forced Labor". You can not force someone to learn and it is not Slavery to be ordered to appear at an activity. Slavery must benefit the Slave Holder economically, never the Slave. Therefore education can not be Slavery.
Also, it is recognized by all civilizations and therefore the Courts that all Societies must pass the skills needed for successful life down to the next generation for the Society to survive and progress. 5,000 years ago, the Village Men would take the 11 year old boys out to the hunt and teach them how to kill a Mammoth so the youth would not have to learn the hard way without the benefit of the Elders experience. Mothers would teach their daugjhters to spin yarn (I think) and plant at the correct time. Imagine if every generation had to RE-Learn EVERYTHING without the past experience of others. Society would collapse, medicine and other things would never move forward and there wouldn't be any Global Warming. What fun would that be?