The problem is the UI for iOS is always very white. That is going the be bad for OLED.
I think things are getting taken out of context is why it is confounding. I said "bright is bright" to summarize why equivalently "bright" displays, whether LCD or OLED, will have the same effect on the eyes. If anything, LCD might be easier on eyes because OLED tends to over saturate colors.
I am not sure why people get so upset and even outraged when someone doesn't laud how great OLED will be on the iPhone. OLED is great for television. Television is watched indoors and has constant motion. iOS devices are used indoors/outdoors, have static icons, and a largely white UI. So unless the iOS device is used indoors the "infinite" contrast is meaningless, the UI will destroy any power efficiency gains, the icons along the top will burn in, fonts/edges will be fuzzy because of pentile pixels, and the device will cost more to buy/repair. Is this cost/benefit worth it just to have OLED?