It’s a relative term isn’t it?
The vast majority of times, a deer will run if it sees you. They’ll often ignore motor vehicles, but if you’re out walking, a deer will alert on your movements, and if recognizes you as human it will bolt. Anecdote abound, and situations vary widely, but a deer, as a rule, will avoid humans.
On the other hand, a healthy buck in the prime of its life is more than capable of killing you, and quickly, if it gets the hankerin’.
I always carry a sidearm when out and about. Elk and moose are common in my roaming area, and I hear that wolves are getting closer.
The unfortunate in the story was apparently unarmed. Whether that would have made any difference in this case is debatable, but having a heavy caliber pistol cannot but improve one’s odds. What an embarrassing way to die!