As i said before im not disputing that it is possible to make responsive design keep same aspect ratio always. Im just pointing out that in reality you can not control all parts of your work. Design as i said can be done by people you have no influence over. And they might have very relevant reasons for making it the way they do.

Obviously the ideal situation isnt to crop images, but if the people using the system is aware they can select images that do not have esential information in the edges.