There is a lack of all-around expertise in homeschooling

The argument

Proponents of public schooling point to a structural advantage that a household cannot easily reproduce: the division of labour among teachers. A public school gives a pupil access to multiple teachers, each educated in their own individual subject, so that the depth of instruction in any one subject does not depend on the breadth of any one adult. A parent teaching their children faces the opposite arrangement. They must learn how to teach everything, not just what they themselves already know about, and must do so across the full range of subjects at once. The difficulty this creates is practical rather than theoretical. Every parent's knowledge runs out somewhere, and where it runs out the pupil meets an education barrier: the parent will not be able to help, not through unwillingness but through not knowing the material well enough to explain it or to correct an error in it. At that point students must seek help elsewhere, from tutors, other adults or outside courses. Supporters of the position argue that this outcome defeats much of the purpose of homeschooling, since the arrangement was adopted precisely so that teaching would happen in the home under the parent's direction, and the subjects where outside help is needed are likely to be the demanding ones where good instruction matters most. The requirement the model places on parents is therefore substantial. Anyone who wants to homeschool must be willing to learn a lot themselves, in effect studying each subject ahead of the child across every year of schooling, and not all are ready or prepared to do that. Because all-around expertise of that kind is rare, and because the alternative already supplies it by employing specialists, proponents hold that children should not be homeschooled but should go to public school.

Premises

Counter-arguments

Just because a parent does not specialize in every subject should not scare them away from pursuing homeschooling. They can teach to their knowledge, and use an online source to help with the rest - much like what often happens in public school. Independence and a desire to learn is created and fostered naturally.

Rejecting the premises

[Rejecting P2] While this may be the case, it is not necessarily a big problem.