I read it as a suggestion vs a demand but I can see why you felt it was entitled. The author doesn't need to care and can take or leave the advice. In many ways it is a shame we don't have the concept of the Semantic Web as an extension to simple Hyperlinks.

Good communication should be the goal of all writing.

Good communication for who?

You wouldn't spell out URL, SSH or HTTPS on hacker news either. I understand it's frustrating, but you can't accommodate everyone.

No one is in a position to dictate individual people what their goals are. That's another example of entitlement.

As an individual author they are entitled to write whatever they want in their blogpost. I as a consumer of their writing am not entitled to anything