Wikipedia articles, and encyclopedia articles in general, are not meant to be "proper long-read" articles. They're meant to be short, descriptive passages that give you enough of an overview to know what the subject is, and directions on where to find more information should you want it. This is not a sorry excuse, it's just the nature of what an encyclopedia is.

Nah, that was just sloppy.

Dashes article is ok though:

https://en.wikipedia.org/wiki/Dash