My wife and I were faced with guessing whether our daughter had an ear infection, or something else. We considered getting a scope, but never did so. We would have needed someone to instruct us as to what an ear infection looks like, but nowadays I would do a quick internet search to find comparative images.
Usually we made the trip to an emergency room before we were able to be prescribed antibiotics. Sometimes our daughter did not have an ear infection, and sometime her ear drum burst before she received medical attention.
Such devices are really an extension of the tendency for patients (and their family) to be more engaged and informed in medical decision-making. It is natural next step after use of a web resource such as Google search or WebMD to better understand a medical issue; see for example the WebMD Ear Infection Health Center.