Earlier quoted context omitted.
I used to think English was useless too until I had to read other people's documentation. The world would be a better place if smart programmers were also competent at writing documentation and comments. I've seen crazy things like punctuation placed in the middle of a sentence. I had to ask, "Is this one sentence or two?" People not using appropriate paragraphs, no headings, rambling sentences etc ... A little bit o…
I didn't say English is a useless language. It's a very useful language, but I doubt a Japanese classroom is a good place to become a good English speaker and user.
I read that as teaching an English class in an English speaking country!