The child who wants to design a roof for the family doghouse will gladly sit through a lesson on the Pythagorean theorem if he understands that the lesson will teach him how to calculate the dimensions of the roof he needs. If a piece of content addresses a particular concern of a student, or even a general area of interest, that student will not tune it out. Most children, as they work through their years of school do, in fact, find areas of study they genuinely enjoy. But these areas are different for different people. The general problem of matching individual interests to fixed curricula is one that is impossible to solve.
People obviously have different backgrounds, beliefs, and goals.
What is relevant for one will not be relevant to another. But this only makes it have the appearance of significance, it does not make it interesting. Some children decide not to play the game this system offers. If children are unwilling to believe that their own questions do not matter, then they can easily conclude that it is the material covered in class that does not matter. Any teacher knows the answer to this question.