You are really dense. Nobody was suggesting that flaps 25 is inherently dangerous. You're reading comprehension issues led you to believe otherwise. However, it does reduce certain margins. For some pilots, reducing such margins is not something they wish to do in order to save a little bit of fuel. Therefore, they elect not to land at a reduced flap setting as a normal practice.

Mistakes happen, as in the Delta 757 case above. It can be argued that if that Delta crew had used flaps 30 with such a mistake happening, there would have been just enough extra margin (tail clearance) to avoid a strike. None of us are perfect. Any of us can have a bad day, including you.

I don't have a problem with flaps 25 personally. But I fully respect another pilot that desires to operate within an envelope that expands the desired margin, even if only slightly.

Be sure and check in with us occasionally and let us know how your buddies over here are coping.