Because you should be processing the images on the server side anyways. I guess it would be nice to cut down on file transfer size, but at the end of the day yo

Because you should be processing the images on the server side anyways. I guess it would be nice to cut down on file transfer size, but at the end of the day you need size limits enforced on the server. I recommend pulling in an image processing library on the server side and reformatting it before saving it, in order to eliminate a class of issues with invalid images.