well when I bow hunted I used to stand I think more than sit, gave me more shots and faster to get ready if already standing, I always stood at first light and last light
I personally feel standing in a tree you stand out a lot less, than sitting

Now i X bow hunt, due to both injury and do enjoy it too
I find i sit more, as I set up most of my stands to be x bow friendly with shooting rails and now most of my stands have cover built into them , either camo material or burlap, or lots of branches and such to blend me in better
but I have shot deer both sitting and standing with all weapons, from bow to rifles to shotguns muzzleloaders
so it can be done
On all day sits I really try to stand an hr sit an hr and switch it up, seem to keep warmer this way too when its cold out!