The way I see it there are two kinds of people:
1. Those that for whatever reason cannot finish a particular boss fight
2. Those that can.
Implementing such a feature would help those in group 1, while not affecting those in group 2. So sure, I see no problem with it.
The only problem I see is if defeating the boss in question is integral to the experience as a whole. But games as a skill test is hardly the only existing form of game so my generalized answer is I don't have a problem with it.
1. Those that for whatever reason cannot finish a particular boss fight
2. Those that can.
Implementing such a feature would help those in group 1, while not affecting those in group 2. So sure, I see no problem with it.
The only problem I see is if defeating the boss in question is integral to the experience as a whole. But games as a skill test is hardly the only existing form of game so my generalized answer is I don't have a problem with it.