When an app pops up and asks for my facebook or gmail, it's stupid that there is no equivalent guarentee like seeing the facebook or gmail url in a seperate win

When an app pops up and asks for my facebook or gmail, it's stupid that there is no equivalent guarentee like seeing the facebook or gmail url in a seperate window where you are filling out your password. Any iOS app that asks for access to an app can harvst passwords. No?