Question is not "do deaf people deserve subtitles", it's more that subtitles benefit EVERYBODY, and also some people CANNOT use (game, movie, etc) without subtitles.
So the experience is better for everyone (at worst, turn it off), and POSSIBLE for many it wasn't before.
Proud of the #gamedev community, #accessibility has been taken seriously there and not (yet) fallen to the global right wing backlash against...doing good things for people.