Everyone writing a web page with links you can click on to navigate through a web site understands HATEOS.

It's just that, for some reason, when you shift to imagining a robot interacting with your site rather than a person, people get confused.

Though, really, I know that the reason is that they're trying to shoehorn an existing set of APIs into this cool REST thing they've heard about. In reality, you need to look at it from the other direction. Or, don't try wrestling with REST.