Well some of it WAS fixed in 35mm. 35mm cameras did advance to the point where loading was "put the film in and close the back." I have a Stylus Zoom 140 I picked up at Goodwill for twelve bucks (I think it was) and that's it - put the film in, lay the leader across the back, and close the back. Loads automagically, rewinds automagically at the end of the roll. Sure it doesn't keep the negatives in the cartridge and all but most people who had trouble loading film also never used the negatives again and were quite content with the one or two sets of 4x6 prints they got the first time.