As others have noted, that's just how I write articles. More specifically, I have an end goal in mind, and to get there I need to establish a scene: make sure that we share a lot of context so that we can consider a problem together from the same angle.

Most articles don't do that, and so they're "short and to the point", but only to a tiny audience that already has the same shared culture. There's always readers complaining that they knew half of it and so I "wasted their time", but they forget about the other half, and also other readers.

Ideally, to please everyone, I would have to write a tailored article /just for them/, filling just the gaps they have. I do that on occasion, but I charge a lot of money for it :)