Because they are plant eaters, and people think plant eaters are harmless. They have never encountered livestock, like bulls, so they think that because they won’t eat you, they are not a threat. They think life is a theme park.

They are a real threat on the Iditarod, because they will use the race course, and they view a dog team as a wolf pack and attack. Susan Butcher lost several dogs in a moose attack before an armed musher arrived to shoot the moose.

After white bears, which will hunt people, moose are the worst. As you say, the browns will avoid you, but moose will get right in your face.