Have we ever seen an *official* response as to why this is legally impossible or philosophically undesired?
I just had a situation where I had a game jam submission with two other Admin/Contributors. One of the other Contributors made changes to the game page while I was asleep - they changed the name of the game, the URL, the cover page... all while the game was still under judgement. I do not trust this person to be able to make Admin changes anymore, but I do not want to remove them as a Contributor because they deserve to be credited for the aspect of the work that they did. I'd have to take credit away from them and that could escalate matters in a way that I can't justify.
We need non-Admin Contributors. I should not be forced to make this choice between security and integrity.