This reads like a case of game design by spreadsheet to me. Instead of the lead designers being creative persons making creative decisions, these are accountants that are designing a game by ticking boxes. They didn’t try to make a game that they would like to play, they tried to make a game that they think others would like to play.
I’m red green colorblind as well. I just see the background as white or a very light shade of grey. Someone else has made a post with a yellow can and in that one I see the background as yellow (which is basically the same as green to me, I have very little r in my rgb), especially the right side of the can.