Of course they are. They literally allow you to ignore all of the most difficult game mechanics. With a great shield you literally never need to time dodges. As a mage, you can easily do ranged damage, so you don’t need to time your attacks or worry about positioning. Using a summon means the boss doesn’t even attack you half the time, and some of them are so powerful that they can beat many bosses on their own.
It’s actually a far better difficulty system than the standard “the game mechanics are the same, but enemies do less damage and have less health” system that most games use.