This kind of online-based education system shouldn't be seen as minority or 'retarded' thing like they often seem in Western countries from my experience, but a local normal.
[0] https://en.wikipedia.org/wiki/List_of_graphical_methods
So if access to info was all it took schools would have never been invented.
Access to info is just one piece. The other piece is a good guide/teacher who knows which routes through the ever expanding library of knowledge are fruitful and which ones to avoid. Justly randomly meandering around is a very inefficient and time consuming way of working out what the right paths are.
Third piece which most people sweep under the carpet, and most critical to Learning is practice. The brain hardly ever registers anything deeply without repetition. And creating an environment where that practice is happening is not straight forward. Its more tempting to go look at something novel than to read the same thing again and again till its on your finger tips. Good teachers create such environments. The Internet is great in the access to info dept, but there are other pieces to the story for Learning to happen.
Wikipedia is a decent resource but I wouldn’t base an entire education on it.
Part of the job of the educational system is to teach kids to do independent research while maintaining appropriate levels of incredulity, which can be very difficult if not consciously and rigorously skeptical. They don't always do a good job, but abandoning classroom education in favor of self-study is probably not a proper solution for the vast majority of students.
But I'd include some mandatory minimal content. Some topics are important in spite they may look boring.