I think it depends on how and where you grew up hunting.
In my family, when hunting elk in Montana, elk were for eating and a good way to get an ass-chewing was to pass a legal elk. I didn't pass on very many growing up, very few that I can remember.
Its gotten a lot easier to pass up more and more elk since I moved to Wyoming, its just better elk hunting here than in Montana. I've passed up a ton of bull elk here the last 15+ years.
Limited quota tags in Montana, depends on the tag. I've had 2 tags in the breaks, passed on some bulls I probably shouldn't have with my first tag. Second tag, I shot the first 6 point that gave me an opportunity.
The LQ tags I've had here in Wyoming, have been pretty selective and picked out better 6 points with all those. Only way I'd kill a cow on a LQ tag here is if there is a late cow only season, otherwise I'd rather eat the tag.