Autodesk makes copious use of videos for documentation and tutorials. None of them have subtitles. A lot of the information is spoken.
I -- along with millions of others -- have hearing loss and trouble understanding speech when I can't see the speaker (or their mouth) and it's about an unfamiliar subject. (Turning up the volume just makes things louder, not any clearer.)
As one of millions of people with hearing loss (half of which are still in the workforce) videos are not very useful to me without subtitles. Without being able to use the videos as intended, learning is much harder than it needs to be.