Well, the playerbase here is smaller and, simply put, not that skilled.
How many times have you seen a boss in the child's play 24-mans we have now wipe your raid repeatedly? How many times have you seen Alliance A all die to Ozma at the same time?
When it first came out it was pretty challenging, after a while i didn't wipe that much at all. Also you gotta understand that if you are allowed to pre-make your alliances before going in(maybe with certain rules) that you are going to have a higher chance of getting the skilled party that you want. You are just generalizing about the player base not being that skilled. Skilled people would go for things like savage, its not always unskilled players going for it unless they have a mindset of improving.
I also imagine something as 24 man savage as being something that is more difficult than 8 man savage but not so unforgiving as to severly punish every death. I always imagined it to be punishing if you only had a ton of deaths.