alt Hacker NewsWord processors are designed to maximise readability, handling things like alignment and white space with zero effort from the user.
These posters don't have the feature of readability. They inconsistently apply the required design principles for this. Removing some of the clutter helps, but a WordArt poster from 1992 is still a better final product for the purpose.
Taking the last poster as an example (1940s cubist style), the graphic seems almost designed to draw your eye towards blank space. This, very precisely, detracts from the goal: the graphic is providing negative value!
Whereas, genuine 1940s cubist art exhibition posters are really astonishingly good at communicating the key information. As one example, https://artposterarchive.com/products/edward-wadsworth-vorti...
Ah, I see that I've completed a full circle, sorry.
The original comment - that this article is a response to - was exactly that WordArt and Comic Sans, or even a piece of paper and a Sharpie, is better at doing the job of communicating the information.