The whole point of Khan academy is democratizing education. Hiring math tutors for the millions of kids around the world that use Khan academy materials is impossible (so far). There are tons of situations where it is not possible to hire a human math tutor, for reasons of cost, access, time, resource constraints, etc. If a kid in a remote village in Alaska with no math tutors can have access to a world class education through AI whenever they need it, then this is a pretty good solution.
The origin of Khan academy was Sal Khan filming lessons for his younger cousins, it was easier to host the videos on YT than anywhere else. When he realized that other people were watching his videos and learning from them he took a leap of faith, and quit his job to start a non-profit with the goal of providing free educational materials to anyone.
If you find a way to hire and fund thousands or millions of tutors worldwide to provide no charge education, get in touch with Sal Khan, since that's what he has been trying to do for the past 2 decades.