Restricting the flight of the animal will serve to protect it from the many hazards that exist in the home. It will make the bird easier to handle, easier to train and easier to live with. One thing that you should realize though is that the moment your veterinarian clips your bird's wings the bird has gone from being a prey animal to being easy prey, really easy prey. Since you have seriously compromised the animal's ability to defend itself you must take full responsibility for the defense of the animal. At the first sign of illness, get your pet to the family veterinarian and ask questions later.
Birds mask the symptoms of illness and injury.
In the wild this serves to protect them from predators. This is beneficial for self-preservation in the wild but very detrimental in captivity. Often by the time a bird exhibits symptoms of illness or injury it has already reached an advanced state. You've got to act fast and decisively to get the animal professional help as quickly as possible. You're ability to detect illness and injury and act fast can mean the difference between life and death.