> Or are you saying that those are examples of low-quality information?

Yes.

This[1] poorly-made Khan Academy video from 2008 recorded in 144p would would not compare with something like the Feynman Lectures on Physics[2].

As for Wikipedia, they acknowledge their flaws.[3]

1.https://www.youtube.com/watch?v=zwDJ1wVr7Is&list=PLqwfRVlgGd...

2.https://www.feynmanlectures.caltech.edu

3.https://en.wikipedia.org/wiki/Wikipedia:Wikipedia_is_not_a_r...

Those are examples of relatively well curated internet resources compared to a typical blog post or medium article. Khan Academy has allowed students the opportunity that underfunded schools miss—-for instance, the ability to advance their math skills, without the need of an expensive tutor.