Well, I'm not really surprised hardcore mode(the one from Fallout:NV) isn't in Skyrim. Survival element doesn't fit with TES games thematically. In Fallout universe, you are in a post-apocalyptic nuclear wasteland that has irradiated water and (supposedly) no food. Food is hard to come by and most of the water is poisonous to drink. Not to mention, you need to keep your 'radiation' level low or you'll suffer from radiation sickness. Survival element is obviously a part of Fallout and it also plays a large role in the story too. They even advertise it as 'American's First Choice in Post Nuclear Simulation'
In TES games, you are not really going out there to survive. The food isn't scarce and most sources of water are always drinkable. It's not much of a challenge compared to Fallout and honestly, it would be a very trivial thing for immersion in TES universe. In Fallout, you need to be consciously aware that food is scarce and you need to manage water resource pretty well which helps you be immersed into this desolate wasteland. Survival is something to be always be aware of in Fallout. In TES, you should worry more about killing undead and monsters, looting dungeons and reading lores.
That is to say, it doesn't mean that hardcore mode shouldn't be in the game. Since its an option, (like Fallout:NV) it can be in the game without interfering your experience in Skyrim and I'm sure a lot of people will enjoy hardcore mod. I'm saying that it's not surprising that it's not in Skyrim. It's just weird that there are people who are enraged by the lack of hardcore mode. It wasn't even in previous TES games. I don't know why they are complaining. oh well