They don't want your brain challenged. Remember, they have to aim for the bell curve they aren't allowed to acknowledge. Are you reading better than a well trained negroid? Then you are an overachiever and thus a problem.
The real lesson of public education is how to be a well trained worker. How to not cause problems with the other workers, or your boss. How to be able to sit and do a task for 8 hours straight. How to competently follow directions.
I stress that this is not sarcasm or doompill. I forget the country, but the US public education system was based on another country's that had the explicit goal of training factory workers. People just smart enough to run the machines but not smart enough to rise above their lot in life.
Regardless, the point of the system is not to learn. If they could push out generations of children who knew how to run the machines but couldn't read, they would.
For the real doompill, picture what these fuckers are going to do once AI or LLMs get far enough along that they don't NEED factory workers.