Do you think linguistic theories help foreign language learning?
I majored in the English language at university.

In my opinion, general linguistic theories, such as phonetics, phonology, syntax and semantics,
partly helped me improve my English skills, but I found it more important to memorize words by exposing myself
to English through listening and writing.

Sociolinguisics, psycholinguistics and historical linguistics were very interesting subjects and helped broaden my perspectives, but they have very little to do with practical language learning.

Applied linguistics are for professionals such as language teachers or speech therapists.
I won't deny the importance of SLA research, but it doesn't appeal to students with no teaching experiences.
Those with teaching experiences find it more helpful.

In conclusion, I think linguistic theories are not necessarily very important for early stage language learning.
As I said, in the second paragraph, language learners, particularly novice and intermediate learners, should
focus more on vocabulary building, listening and reading.
In my opinion, linguistic theories help learners organize their knowledge about the language they learn.
However, this happens when they have reached advanced levels.