Many birds are injured or killed each year by flying into windows. It's a very real problem and will be a big one to overcome. Fly only in safe closed in areas where escape is impossible. The most serious concern is of course escape. If a fully flighted bird gets out the door the chance of recovery is extremely poor and that's the main chance we take.
Wing clipping is an individual decision and a much debated topic.
But we love him that way and will go to all the extra trouble to insure his happiness and safety. I'm sure you will do the same. All this being said, there are many good reasons to clip a pet bird and in most cases this is recommended for all but the most experienced bird handlers. The primary reason to clip a pet bird is to prevent it from escaping. If a fully flighted bird gets out the door, your chances of getting it back are slim and none.