Very true.
At a prevalence of 4 per 1000 (1 in 250, as above), childhood deafness is about as common worldwide. So think about how many deaf people you've seen represented, and now compare. Who's actually under-represented?
The ideas of representation the SJW crowd has are not evidence-based.
For example, while black people are modestly underrepresented in Academy Award nominations, there's a group that hugely underrepresented but gets no airtime about the issue: Latinos. Gay hate crime murders last year outnumbered the total number of trans murders (many of which weren't hate crimes), and the number of anti-gay hate crime murders went up 400% while trans murders went up by a far smaller percentage. The narrative was just "look at all the dead transwomen, transwomen are risking our lives being out in public, record number of dead trans people!"
This kind of thing happens all the time, the actually underrepresented people are ignored in favor of a narrative that may or may not have any basis in reality. I don't know where it started, but the groupthink is such that you're not supposed to question the narrative, just go along with it or risk being ostracized for daring to double-check the facts.