While I have seen a grizzly bear, fortunately it was at a considerable distance from me. It is one animal you do not want to have a ... "close encounter" ... with, as you would be unlikely to survive it.
My son and I did have a "close encounter" with a black bear, but it left us alone, thankfully. The predatory nature of grizzlies is well known, by comparison. And that is the reason there are not that many of them, in most areas.
Our forefathers killed them, without mercy, wiping them out ...
Moose, on the other hand, are more common. I have had a number of encounters with them. Also not an animal to have a close encounter with ... If I were to choose, however, I would far rather have to deal with a moose than a grizzly bear.