My clipped bird got away, she was on a light to medium clip, but she has a few of her very first primaries back in. And we faced serious problems with her out overnight. She was exposed to some really scary (maybe nighthawks?) predator birds over night. She had a very hard time flying down and steering in the large open areas. We were so lucky to get her back. I literally slept and sat in a lawnchair in the front yard of the tree I was fairly sure she was in. I wanted so badly to protect her from the hawks/owl that were in the area, but being 3 stories high there wasn't much I could do from the ground except cry.
Unfortunately we can't be 100% flighted here. Sunny (ironically my escapee) must be partically clipped or she becomes an agressive nightmare fid. All my scars from her occurred when she had most or all of her flights in. She has many triggers for biting, and they're 1000x's worse if she can fly. So I must keep about 5 feathers on each side trimmed. Not a full clip and she still gets around with some effort.
She actually flies better light clipped than Kupo does fully flighted. Kupo is a brick with wings.
I agree, no bird escapes because they're not clipped. Birds escape because of mistakes we make. But we, as a group and as a Parront, must learn and change our lifestyle so that they are not repeated.