I imagine it is just easier to balance that way. "Death" in these games really just means teleporting you to a predetermined position and restarting the encount

I imagine it is just easier to balance that way. "Death" in these games really just means teleporting you to a predetermined position and restarting the encounter (in the souls games also adding a chance to permanently lose some of your gathered resources, which based on the non-linear stat leveling don't actually matter all that much). I would also add that in the souls games the dodging is very lenient, if you spend the first couple of minutes of a boss fight simply not getting hit you can usually see most of the bosses attack animations and beat it on the first try if you don't mess up. Based on the alternatives that actually exist the cure may be worse than the disease. In many modern AAA games you never really have to learn anything, the game just lets you progress regardless. Unless you play on the extremely hard difficulty modes that just completely break the balance of the game (the hardest difficulty mode on the Uncharted remastered is a good example of this).