Just curious, why would KA not want to be a complete solution for education? I can understand the political incentives not to openly state such an ambitious go

Just curious, why would KA not want to be a complete solution for education? I can understand the political incentives not to openly state such an ambitious goal - the educational establishment is massively powerful, and doesn't want an upstart replacing them. But is there a reason why, in principle, KA wouldn't want to be a complete solution to all of education?