Yeah, it is really comical, but it's not "just" a graffiti piece, the same way that the painting of the Campbell's soup can it's not just a painting of a Campbell's soup can, or football is not just 22 guys chasing/transporting a ball. You have to look at the context.
It's actually about a 50/50 split between rural and urban [0]. This means that the Chinese urban population nowadays is 150% of the total Chinese population in 1950[1]. So now that the facts are on the table, what is your point?
I think that it would be easily fixable. Every time you disable an account you send an email to the email address they registered letting them now about it with a link to reactivate it. For the reactivation, you can even add a normal catpcha to prevent the bots exploiting the loophole.
You are looking at it from the content consumer perspective. I'll give you the content producer view. When I realized that my Instagram pictures had far less reach on twitter than other options, I stopped using Instagram to share pictures on Twitter.
The fact is that when it comes to SMB the physics are a make it or break it kind of deal. If he hadn't spent that time tweaking them, SMB wouldn't have had a chance to succeed. And I'm not saying that the physics are the key to its success, but they definitely were a requirement.