They can't, I would say, ensure that it won't happen to anyone else—at least not yet. However, they are working on it.
Since that time, Air Canada has made a number of changes that it's trialing and testing whether or not mobility aids like mine, that can be taken apart or folded, can be carried in the cabin with me so I can be assured it's there. It also has an add-on on its app that will track a mobility aid when it's being put on the plane so that the passenger can see that his or her chair has been loaded.
It is making good attempts to ensure that this doesn't happen. It will remain to be seen how well that works over time.