Originally Posted by
Illmaeran
Quoting for emphasis.
I'm one of those people who have a limitation and actually did leave the game because I couldn't get past an MSQ point no matter what I did. It wasn't until more than a year later with some recovery and PT that I was able to regain enough processing and reflex speed to get past that point. Even now I find myself having issues at times with mental processing speed and routinely eat mechanics for an amount of time that would horrify "git gud" players. The MSQ and Normal content need to remain easy enough to be challenging, but not painfully so, for the general public; including those with limitations.
I don't begrudge peoples' desires for a challenge. That's why they made EX, Savage, and Ultimate for.
Considering duty boss difficulty/ease; yeah, the story builds them up to be very powerful, but it also builds the WoL up to be even more so. We're supposed to be this almighty hero that can defeat all challenges eventually. Don't forget, for a number of those, it's canon that we have help - the fights against the Big Bads in ShB come to mind.