It irks me when that happens. I wonder if they say it to try to relate?
The most annoying to me is when they diagnose themselves with nothing to back them up.
"Oh, I have hearing problems too. I think I'm kind of deaf in my left ear. I've been jumping around from doctor to doctor and they all say my hearing is fine, but I don't believe that.
^ I know three people who act like that and only started saying that after they learned I am HoH (I don't tell most people unless I find it necessary or they ask. So a good portion of the people I know don't figure it out until a couple years later and just thought I was super quiet, ignoring them, or that I just was "dumb").