I can’t speak for the author, but personally I hate tools like go fmt, es-prettify and cargo fmt. I’d never use this stuff by choice because they delete the work I do to make my code easier for me to read. For example, I use extra blank lines to separate different parts of a function, or separate groups of functions visually. These sort of tools like to delete vertical white space, which hurts readability. In javascript I’ve seen plenty of very readable ternary operators (possible with the correct layout) replaced with unreadable junk by the prettifier.

It’s soulless to make all code look like bland corporate cardboard. It appeals to our OCD perfectionist tendencies but in my experience provides very little real value. Software is like writing. It can’t help but express how the author thinks about their code. These tools try to iron that personality out - and for what reason? Who cares in javascript if some files use semicolons and some don’t? Who cares if my where clause is on the same line or the next? The compiler doesn’t care, and neither do I.

(I will grant that all files in a project should have consistent white space, but you don’t need cargo fmt for that.)