What you are proposing QuickTimeKirk is a work-around. Prior to the QT update users did not have to do this, they simply hit the green button and the video enlarged to fit the screen. Your proposal works only once, the first time you call up and view a video. If it retained the enlargement from that moment on so that every video you called up in QT would 'fit to screen' when pressing that green button, then it would be a viable option - but it doesn't and it isn't.
Again, I sit many people before my 30" Cinema screen to watch and learn vital medical procedures. As a doctor I cannot "be at hand" with each sitting and instruct each viewer in the manipulation steps you cite. "To fit to screen hit green button" was all I needed to say.
What I've had to do is change the default video player over to RealPlayer or VLC because those players retain the ability to hit the green button and fit to screen with each and every video that is played. No viewer has to fiddle with finding the menu display option.
I guess Apple believes they are helping people by adding the full screen feature and in their desire to help they have hindered a once easy to use application and jingled the money in their pockets from those who previously paid to get the full screen display option by purchasing the Pro version.
Tim...