Discussing how difficult a game is by discussing how easy it is to cheese your way through it, is absolutely pointless. Most people i know, play games for fun, not to beat them. When people talk about the most difficult action games, people talk about their hardest difficulties and with restrictions, cause there exists dumb shit in every game so unskilled players can beat them.
When this game actually requires you to play like nioh, it is way harder than a souls game, which requires 0 skill outside of memorization,timing and spacing.
No, the game requires you to press more than one button and then roll away. If you wanna do that, sure the games gonna let you, if you have the patience to chip away at health bar.
This is how i see most people handle a boss ( BT)
https://youtu.be/HxdV03qygp0?t=32m35s
This is how i handle it
https://youtu.be/sSMYS-gTcrU
This is how joefenix handles it
https://www.youtube.com/watch?v=_xlioygef9Q
Notice how theres alot more mechanical skill in the later videos? Thats the difference between bosses taking forever and them not. The health is balanced around you having a better gameplan than "hit the box till it dies".