This is actually quite normal. Humans have an innate fear of strong creatures. Although these herbivorous dinosaurs eat grass, given their size, they can easily crush a person.
It's natural for humans to be afraid.
Just like elephants. You know they're herbivores, but would you dare to grab a wild elephant's tail?
It would stomp you flat without hesitation.
Many times, herbivores are actually more dangerous than carnivores. Carnivores, when full, generally ignore you unless you accidentally enter their territory or approach their young. They rely on hunting for energy and naturally don't waste energy bullying you.
But herbivores are different. Precisely because they're weaker, they're more sensitive to disturbances. Don't even think about touching them - just approaching might make them believe you're a threat, and they'll turn around and kick you.
Indeed, herbivores won't eat you, but one kick can rupture your organs. Survival is near impossible!
