I believe Dave has brought out some very important points when it comes to our greys, amazons or what ever parrot you may have.
1. You can`t compare apples to oranges, and
2. domesticated and wild do not share the same definition.
Stay, stop and no, how many times a day do you say this to your parrot.
I can tell Corky no!! and she will stop what she is doing for a moment And turn her head side ways and look at me with one eye and on the other side of her head she is looking with her other eye at the wood work and planning her next harvest of wood splinters.
You have to isolate the room she wants to be in with as other members said some kind of curtain or a door.
Putting something they are afraid of may stop them for a time, but if they want get there bad enough, and after a time they find out that this thing that they are afraid of won`t eat them, well you know.
We need to do the imposable and that is out smart them, ha, ha, ha lol.