What's wrong with the middle?

I see all sorts of things in the fitness world on the extremes. "You need to go "Beast Mode" in the gym or have a "Warrior Mentality (let me sell you my plan)". -"If you don't puke during your workout you didn't have a good workout (let me sell you my plan)", "You have to completely avoid (insert food/food group here) in order to achieve (insert objective here) (let me sell you my plan)",

I see it going the other way also. "Squats are bad for your back and knees - you need to work on being functional by dancing around with light weights and balancing on a physioball (let me sell you my plan) " - "You don't really need to spend more than an hour a week in the gym to get totally ripped (let me sell you my plan):", "You can keep the fat off while eating as much of your favorite greasy, sugary food as you want and more (again, let me sell you my plan)"