People are not "bent out of shape" because of the moving surfaces. People are concerned about how thoroughly they've been tested. At the time when first flaps and slats and engine reversers were introduced people didn't know much about planes. Now they do. They also thought that plane makers were doing everything to make flying safe. Now they know that Boeing has been cutting corners for the past two decades, and they don't want to be the ink of "rules written in blood in aviation".
And because it's their own families travelling on those planes, they don't really mind if Boeing turns out the lights if it means safer travel. Recent developments in the world economy proves that it won't be long until another plane maker takes over.