Agree! And have definitely noticed this both on websites and apps, that sometimes for example it's impossible to highlight a field that's buried behind the keyboard.
One would think that you'd test the whole iPhone range when developing, since it's actually doable (compared to the Android landscape with infinite resolutions) but no.
I'm not blaming Apple for that though.
I don’t understand why people don’t see this!
It wouldn’t be so bad if the phone had a window manager and you could keep everything you wanted in a corner (although the iPhone 7 digitizer feels less accurate than the SE was so maybe that wouldn’t work so well.)
That said, this boat has been sailed. Modern apps won't work on tiny screens because their developers optimize for large screens, so it's a pointless desire.