I think that depends on what other options are available and how well they work.

I don't have an NYT subscription to see if there's more detail in there, but I don't necessarily take every complaint at face value. It wouldn't surprise me - since this person was there for 6 years - if other accommodations were provided that many people would consider "reasonable" and a sign-language interpreter wasn't actually necessary to perform the job, but there's just long-lingering bitterness over not getting precisely the accommodation that was desired.