The way you seem to be looking at it - yes, I mostly agree that the company should not outright be expected to essentially hire another fully time employee to work as the deaf employees interpreter. But in the 21st century, in the developed country that is the United States, I very much feel as if there should be some way to quickly and reasonably pair this employee with a student(s) of a local sign language or whatever school/program in which they come and go assisting in translation services for part of school credit/curriculum/outreach. Anybody learning a language will tell you there's nothing better than real world experience.
This gives the disabled (in the form of being deaf) person a meaningful occupation/independence, and students an assured way to get important experience. However, since the US is a highly capitalistic machine, we seem to not have reasonable things such as this set up on any meaningful scale.
Lots of downvoting. Do HN users have beef with disability accomodations or something?