As usual this will not be a popular thought, but, perhaps the reason why Disney seemed so perfect in the 70 was because of what was happening around them. And the 70's were not even the worst. The 60's by sheer volume of deaths was far more difficult to deal with. President Assassinated, MLK Assassinated, Bobby Kennedy Assassinated, thousands of men and women in the Vietnam War were dead, never to fulfill the promise that they held within. By the time the 70's came around the problems that may have been a first to one generation, were old hat and hardly as intense as the older folks had gone through. The generation before that, my parents, lived through the Depression, World War II and the Korean War. Those that experienced that time one didn't look for problems and if they were there they were promptly put into perspective and prioritized as the their severity. Not too much that might have been wrong with Disney at that time would have registered very high on the scale. Maybe that is why some of us, see problems, but based on life, discount their importance.
Look around WDW or DL, I'll guarantee you that you will find problems. As hard as they may (or may not) try, the realities of life, science and time will create some. Tell you what, try sitting in a spot with Mortars and Rockets dropping around you, praying that one doesn't hit you on the head, and then find a way to care if an AA isn't working, or there is some paint chipped somewhere. It's not Pixie Dust that we are affected by, it is life. We as separate groups, will always be, but, it won't stop us from seeing the world, the real one or the magic one, through our own unique perspective.