A lot of you are missing the point, I personally don't like a lot of what Tate does/says, but this is mostly about the domain name. Education has been reserved to central authorities that he (and a lot of people) disagree with.
Education being the foundation of humanity, individual creators are the decentralization of education. Given the current path "formal" education is on, where as dissenting ideas are labeled as wrong-think and people are being sanctioned for even saying certain things, it's important to note there is power in owning such a domain and having a massive audience.
Is it going to make Harvard or any institution mad? Who knows, and frankly it doesn't matter.
Is it going to formalize his teaching? Maybe, I think Tate has a big enough audience he could sell t-shirts if he wanted to. But he has enough awareness to know education is where the true growth lies, and pairing that with a category-killer domain is likely going to make the sales process a lot easier.
The education he sells might not be equitable in substance, but it is likely helping people create results. I personally have never seen anything other than basic information from him, meaning there isn't anything unique or groundbreaking.
But that should really put things into perspective.
We should all be building value by sharing what we know, building an audience and pairing that with the knowledge of domains that someone like Tate just recently acquired.
Domains are powerful tools!
Instead of looking at domains as a means of getting $10m, perhaps it's time domainers acquire the skills and knowledge to utilize domains as a tool to create continuous wealth through education. Just my 2 cents