Here are some resources to educate yourself:
https://www.nngroup.com/articles/visual-hierarchy-ux-definit...
https://xd.adobe.com/ideas/process/information-architecture/...
https://uxplanet.org/visual-hierarchy-and-ux-design-a-guide-...
https://www.interaction-design.org/literature/topics/visual-...
https://guides.lib.wayne.edu/iaux
It's a field of study that has research to back it up. It's great you find that link legible, but most people would not. Even most developers would find it helpful to tweak whitespace, use headers, and layout the content a little more structured to improve legibility.
The entire field is like nutrition or fitness, 90% of it is bogus and made up. None of these studies have proper controlled experiments while still trying to appear as authoritative.
No one takes a step back and realize that physical books are an interface and so is your kitchen. Photons hitting your eyeballs have no clue if it came from a computer monitor or the world around you. Organizing visual information is far deeper than these "UI/UX" experts.
https://scholar.google.com/scholar?&q=Djamasbi%2C%20S.%2C%20...
https://scholar.google.com/scholar?&q=Djamasbi%2C%20S.%2C%20...
https://ourapps.princeton.edu/uploads/190805104123-A-3176.pd...
https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.87...
https://www.sciencedirect.com/book/9780124081383/eye-trackin...
I'm sorry, you just don't know what you are talking about. This is a widely studied area in human computer interaction both academically and informally.
