I think something in the middle is best. I've never had kidney problems, yet developed stones for the first time in my life in my 40's about a year after drinking 2 protein smoothies a day for about 4 months. I think the 2 were related, as it's very rare for women to develop them in mid-life, it's more of a men's disease. Most women who have them get them consistently from an earlier time in life. So, just saying that I think eating lean protein is good but there is a threshold.
The show also discovered that by eating lots of dairy in your diet, you excrete 100% more fat than you do on a diet without lf dairy. That part was amazing, as was the technology with which they analyzed the results!
They were careful to say, calories in and out still matters - don't eat GALLONS of yogurt each day, but for those who can incorporate it a couple of times a day, you will have a favorable outcome.
Now to find out if that study was sponsored somehow by the dairy council, which is what I've heard other dairy research accused of resulting from. But the amount of fat that was excreted couldn't be denied, and it was done in Finland I believe, where they probably have less active dairy councils.