Bioshock Infinite was numbingly easy on Hard and 1999 mode was the same except the penalty for death was higher. The amount of times you die though is roughly the same, so if you plan ahead you need never have a problem.
Games being difficult has a line. Games shouldn't be difficult for the sake of difficulty. Skyrim, Oblivion, Fallout 3 are not games you play on Legendary difficulty unless you know every aspect of the game from head to toe and know exactly where the best armour is or how to exploit skills to make the most tanked up character possible so it is impossible to die. This is because the difficulty is primitive and the only change is enemies do more damage you do less. That isn't fun, especially not when the game mechanics are so simple that you can't really do anything to vary how you go about situations. You can run it or sneak, but if you are 1:1 with a character there is very little variation. So the only option is like I said to tank yourself up to such high levels that you can survive.
Contrast to Dark Souls. It is hard but the game feels do able. You learn enemies and move sets and actions to overcome an enemy and progress, it isn't a matter of exploiting the game. On the first run through of Dark Souls I got killed by the Drake, probably six hundred times. On my second play through on a new character I killed it first time. I played, I died, I learned, I overcome and I am now a better play because of it.
I still can't get through some caves on Skyrim on Legendary if I don't use the alchemy, enchanting exploit to get 100,000 defence armour, and 50,000 damage swords. So what is the point in having it as an option?



