I know and it's terrible solution. It oftens gets reset when I'm tapping something (but sometimes it's not), so I have to double-tap again (especially when I want to edit URL in Safari). And anyway reaching any screen point with one hand is vastly superior experience than using workarounds. I've found myself using two hands more and more and that's a step backwards.
May be better UX design would solve that. Any controls should be at the bottom part of the screen. But iOS is not there anyway.