A birds happiness is directly tied to their ability to fly, forage and socialize. Clipping takes away one of those aspects. Not every clipped bird plucks but you are increasing your chances. People usually clip to prevent a fly-away, keep the bird out of stuff or some other reason. Whatever your reason for wanting to clip, I would find an alternative around it. I put up chain curtains on our doorways to prevent an accidental escape and I built aviaries to give them lots of stuff to do and be free of their cages. I took in a couple of birds that had been clipped and caged and not allowed to fly. It took about a year for them to learn how to fly and get past the clumsy stage. Neither are as good as the birds I have which have never been clipped. I have one bird which plucks and we can't figure out why. She didn't before she came to us. She was a 100% cage bird before coming here and I think her sudden freedom to roam and find nesting holes has probably led to her pulling her feathers. However I couldn't go back to watching her perch potato in a cage all the time. There's lots of ways around clipping and I love having a bird that can come to you on their own power.
I guess in the interest of your survey: I bought my Grey as a baby at the same time as my manager at work. I've had previous experience with a Grey in my early 20s. He had zero experience. I was hell-bent against clipping and tried to steer him away from it as well. He clipped his bird and within the first year, his Grey was plucking. They have struggled with it ever since. They have gotten a handle on it now that they are both working from home (socialize!) but I think they could have prevented it maybe if they chose not to clip.