Is going to language school at n5 or below level actually a waste of time?

My japanese tutor says she has lots of students who are in language school and at n5 or below because they don't know wtf they're saying and cant follow the instructions/teaching they're given. I was wondering if anyone has experienced this?

Also would prefer to not hear from the experience of someone who went to a western appealing school like genki JACS

Edit: not asking for myself im well beyond n5 level