Agriculture encourages settlement, people can gather together for safety. Before that, they were moving around all the time, getting killed by a tiger was a realistic fear. Hunter gatherers had a tough life, even if successful on average.
If you've ever seen a brown bear...there isn't much you can do if you aren't armed with a gun, and even then....
Of course, the main benefit of agriculture was food security and surplus, allowing a whole bunch of activities not possible before.
Brown bears don't generally like human, as I have found repeatedly when seeing them in the wild. Your fear is ungrounded and irrational. Step one: don't interact with bear. Step two: don't smell like dead animal. Neither of these are hugely difficult and are easy to grasp lessons.
At no point was predation a major problem for humans. Again, nutrition and infection would most likely dominate hunter gatherer mortality.
And yet a few people get killed by brown bears every year in glacier national park through no fault of their own.
Also as a PSA, playing dead works (better) for brown bears since they aren't so interested in dead things, never try that with a black bear who are more like scavengers. If you saw a bear in he states outside of northern Montana or Alaska (or yellow stone), it was just a black bear.
If you've ever seen a brown bear...there isn't much you can do if you aren't armed with a gun, and even then....
Of course, the main benefit of agriculture was food security and surplus, allowing a whole bunch of activities not possible before.