This is an answer of Lucas Ferreira in Quora in Portuguese.
It is not out of fear, it is out of concern. The tiger lives alone, so it prefers to hunt by surprise, so as not to get hurt, because if it gets hurt it will not be able to hunt and can starve if it is seriously injured.
On the other hand, most tigers live in humid places, which makes them difficult to heal quickly from injury.
￼ In India, people know that it is harder for a tiger to attack you if you are in front, so they wear a mask behind your head, but that does not guarantee that they will not attack you.
Most attacks on humans occur due to human invasion of natural habitats, big cats do not hunt humans for food.