There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
It's a nice story, I certainly don't doubt a large male bear would be able to take on a male lion or tiger. Anybody who would think that an animal with a significant weight advantage wouldn't have an advantage over another with similar weapons would be crazy. But at the end of the day, tigers and lions have killed bears and vice versa. For every impressive bear vs big cat stories there are just as impressive big cat vs bear story.
Unless this person has seen both, measured both, weighed, hunted, etc. There really cannot be much stake put into an opinion.
Just reading the Yellowstone article I posted, the largest bear ever weighed there was 597lbs which is the same as the largest tigers that have been weighed. We both are aware of the morphological differences between the two, I have heard of stories of single shots killing them and other times the single shot does nothing to them. Both are durable as it gets, lion included.