[Question] How useful are YT auto-subs to those with limited hearing?

I am working on a project that archives 80s and 90s tech documentaries and TV segments. The goal is to archive them to multiple platforms, to attempt to better ensure they don't become lost media.

Many of these videos don't have their original closed-captioning retained, so the only option is the generated subtitles.

I want my archives to be as accessible as possible. So my question is, are the YT auto-generated subtitles useful for those with limited hearing? Or maybe the question is, are they better than nothing?