We don't read documentation to entertained, but to solve problems. How searchable your text is extremely important.

I don't know whether it is only in my country, but teachers in school teach students otherwise. Not repeating the same word for the same things is alright for elegant literature, but problematic in the digital era.

Yes, literature and technical documents have different requirements.

At least in the US my undergrad computer science degree had a course on specifically writing technical documentation