I have extremely sensitive hearing, and I'm an extremely sensitive person. Most hearing people relate to me the way most deaf people relate to hearing people. So I've probably got a different perspective on the idea of perfect speech.
It was brought up that people go through speech training for jobs like reading the news on TV - they work on their diction and tone and other aspects of their speech. I happen to find most of those people's speaking styles unbearably abrasive. It's overly polished, I feel like they're shouting at me, and there's something really ugly about their voices: it's as though all the humanity has been sucked out of them.
So I think that the training for those jobs is directed at a specific goal, but that goal does not equate to any sort of perfection, because there are so many different contexts for the use of speech, so many different people with different needs and preferences. It's just a very subjective area, and commercial standards are only one of many possible perspectives on what's desirable.
I should add that I generally find public television announcers' speech to be much easier to listen to than those on network tv, and even better than that is a quiet, respectfully toned conversation, one on one, in real life. (Best of all for me and my sensitivities is often a voice-off conversation, but this is a thread about oral stuff, so, getting back on track...)
And speech is so intertwined with voice, which is a more natural personal thing than the stuff you can more easily train, like diction. And it's not hearing vs deaf. I know hearing people with voices that are so awful that if they start talking it becomes physically urgent for me to leave the room. And others I could happily listen to all day. Same with deaf people, at all different levels of clarity. I can think of one deaf person with a voice so beautiful I just want to shut my eyes and listen. He doesn't voice much, and when he does it's just a word here and there, that I wouldn't be able to understand if he weren't signing. Then I know deaf/hh people with all different levels of clarity in their speech and different degrees of deaf voice, and they vary wildly too, independently of how close they are to sounding like a hearing person.
There are just so many factors, and so many different people out there, different in so many ways. You can talk about clarity (which is also somewhat subjective, because people's listening skills massively vary too. Some can't understand anything that's remotely different from what they're used to, and others are much better at stretching themselves and catching what's being said) and you can talk about perfection, but I doubt everyone will ever agree on just what that word means.
I once heard a CODA say that deaf voice is one of the most beautiful things in the world to her. She sometimes uses it when socializing with her CODA friends. She doesn't do that as ridicule. It's like the aural equivalent of a hug from her mother.