“[Citation needed]”. Justified text (more often than not) looks awful[1] and breaks reading rhythm (even if not consciously perceived). That doesn’t prove your claim is incorrect; I’m pointing it out to explain why I find it dubious. What’s your source to say that most people prefer it?

[1]: https://news.ycombinator.com/item?id=25338737

Justification falls apart on mobile web where too few words can fit on a line and then you get big gaps between words.

On longer lines, a ragged right edge makes a good visual guide to keep the eye on the right line while reading a wide justified paragraph is hard to keep track of while reading.

https://medium.com/@meetchopz/10-bad-typography-habits-that-...