I'm reading it like the hedonist's treadmill. Why be happy with a 6 figure salary when there's people with 7 figure salaries? Are you content with your current situation, or are you missing a part of what it means to be human by not having better eyesight, better teeth, better hearing?
I think what OP was referring to was how rich the lives of the deaf can be, and how discouraging it might be to hear "y'know, you're not /really/ experiencing life until you can hear"
Why should curing deafness not be a goal of medicine?