You have read my comment inattentively, I consider QWERTY-inspired ones exactly as weak as QWERTY.

Speed is not important in typing goals at all. What maters is ability to delegate a typing routine out of your consciousness. No peeking, no misusing pinkies, no caring about WPM, no mismatching keys from different layouts. You should always prefer to put all of your 10 fingers on the keyboard even if all you need is to type one letter, even being interrupted from sleep, because you should understand that touchtyping is faster than hunt-and-peck even in one-button case.

You either can input your password using touchtyping or not. If you have achieved touchtyping on any layout, no switching helps you to decrease cognitive hardness. Touchtyping should be done in youth, so if you are not cosplaying some idiots you should devote your brain cells to the proper layout at once.