Personally, I don't clip. I live alone, and there are no predators in my house. I have my living room decked out with toys and swings, and whenever I'm home they are out flying around.
I really believe that flight is important to our fids health. I mean, if you look at a wild bird, they are almost always on the move, flying around. In our homes, they aren't. This often leads to our birds being overweight and unhealthy. The more exercise they get, the healthy they will be. It's the same as people really. You take a morbidly obese person, and you stick them in an office chair all day, and their health is going to be poor, and their lifespan will be shortened. I want my birds to feel good, look good, and be around for as long as they can.
I think a lot of people prefer to clip their untame birds wings. Those little guys can seriously buzz around fast! And if they don't want to be caught, they won't be. I have kept untame budgies for a number of years. But, it is totally possible to train the most wild of budgies to go back into their cage when play time is over.
One of the greatest joys in owning birds for me is their flight. Having a bunch of little budgies zooming around is just so much fun to watch.
Plus, a fully flighted bird is so much prettier than a clipped one
It depends on the bird as an individual and the unique situation the bird lives in. There is NO right or wrong answer or "better" way. Domestic birds do not live in nature, eat natural diets or do natural activities. Flight is just one other thing that may be different for them in a domestic home. My parents have 3 fully flighted parrots they've owned for over 40 years. Never an escape, the only time they clipped was the hyper aggressive cockatoo when I was a little kid (to keep him from dive bombing me). My bird is clipped, he came to me that way. He has been his whole life and never learned to fly. I clip him myself and do a light clip. He does not have 'butchered' wings. He is happy, confident and well adjusted. He has no concept of flight, but he does have ways he can communicate to his humans he would like a ride and has become an *excellent* climber.
We also exercise him daily with wing-flapping exercises indoors and outdoors (weather permitting) to keep his muscle strength up, though he digs his talons into your hand and hangs on for dear life! And yes, I am holding those toes TIGHTLY when he's outside!
"Because clipped birds just sit on their perch and mope all day, never experiencing the joy of feeling the wind in their wings"
I would seriously reconsider taking him outside like that, even though you are holding tight to his feet.
Being a member of forums for a number of years, I have read SOOO many stories of people losing their clipped and flighted birds outside because they weren't in a harness. Birds that have never shown interest in flying or prefer to run and climb away will still know how to fly. It is natural. It takes any kind of perceived danger to send them into a flight frenzy.
Also, one good nip you may accidentally let him go.
An aviator harness is a great way to get them to go outside, and experience some fresh air, while still staying safe.