What you're describing is called "teaching".
I have a 6 and 8 year old and we had about 8 weeks of home schooling here in Australia. We took the time to check out a wide variety of online learning resources.
Khan academy is great, but a little dry. Some other things have a little to much flair and not enough substance. I think there is a lot of great work to be done here.
Professionally made resources with tests and assessment built in could make a big impact. Student's can learn at their own pace, and I think most of it could be made just as "fun" as any video game.
The hardest problems will be "social". Determining when a student is lacking motivation, or when they are confused. How does and AI encourage them or clarify things in a way that's not more demotivating.
Actually, I'm sure the hardest problem is political, but putting that aside, building an online platform for years 1-6 would be really interesting. Years 7-12 would actually be a lot easier I think.
My kids know a hell of a lot about the video games they play, and they didn't need a human relationship to tech them how everything works.
And it has been so for nearly 20 years and changed very little. MOOCs are a failure as people will not finish them. Online certificates carry no weight with employers even if people do.
We have promising prototypes of self driving trucks. We don't have such models for education.
OLI before that had good prototypes too.
The low-quality junk came in scaling. Part of that had to do with culture and people (business people took over from academics). Part of that with economics (people didn't shop on quality). Part on difficulty training. Etc.
The problem is in getting students to complete the work, be honestly assessed about the work, get feedback on their work as well as for employers to believe that the assessment means anything.
Information quality can be interpreted many ways. I wouldn't say most teachers are good at their job or at presenting information. Most I had were not good at the job - a lot of them were babysitters and acted as such. At the college level, it's possibly worse where the people are so consumed with their research that they have absolutely no interest in teaching or getting good at it.
Textbooks are also very poor quality. History textbooks are probably the worst offenders.
I agree with respect to the current education system.
History is hard to correct as it is politically thorny and frequently disputed. If I built a e-learning system, I wouldn't include that.
MITx became edX because of that misalignment.