It is something that detracts from my experience though, it can even be the factor regarding whether or not I buy a game in the first place. I have no problem with how others play games, but putting a slider in DOES take away from my experience, it's not really an opinion; It does.
Dark Souls would never have received it's level of infamy if its current iteration was only found on the 'super ultra hard mode' while 3 easier modes existed below it. It would have been a very average game at best and I likely wouldn't have even attempted it. I just genuinely believe that games are flat-out improvements when developers focus on the one difficulty rather than 5; I feel that 'normal' mode is designed to be easy enough that anyone can beat it and 'hard' and 'easy' mode are an after-thought with percentage modifiers.
It just doesn't feel good to me and it greatly influences my decision on whether or not i'll purchase a game or how much I'll enjoy it.