At my Scottish school in the 1950s, English ( both language and literature) was the most important subject. Analysis and parsing had to be mastered to pass the qualifying exam at age 11-12 to enter the Senior Secondary school and Higher English was required at age 16, 17 or 18 to matriculate at any of the four ancient Scottish Universities. When I left school Scotland had not had a new university for five hundred years. Higher English was required for all undergraduates, whether they were studying English, history, foreign languages, mathematics, science, theology, engineering or any other subject.
I'm not sure I could now do the analysis and parsing exercises I did when I was nine or ten, but I do think we were given a good grounding in our native language.