Also, love the presentation on this page.
The glitches serve to remind them daily that their government is manipulating them.
The dilemma that China's leaders have is that they need an educated workforce, capable of logical and critical thinking, but they can't stop that workforce thinking critically outside work.
We also forget that, in the mid and late 1900s (or, like many of us, just weren't born yet), many (though not all) of the same kinds of censorship were present in American TV, and to some extent movies as well.
I do find the Chinese version to be more insidious (and more dangerous, given current surveillance and content-blocking technology), and much of it probably is, but I do think some of it is just unconscious nationalism and "othering" on my part, as much as I try to stamp out that kind of thinking in myself.