Not easier, lower-risk. Agriculture produced a standard of living with a lower mean but a much thinner left tail.

> People moved from a hunter gatherer society to an agrarian society because the latter was easier.

Agriculture began from a convergence of climate stability, resource abundance, sedentary living, population pressure, and co-evolution with useful plants and animals.

Hunting and gathering alone cannot feed everyone. Farming is harder, less healthy, more labor-intensive but yields more calories per acre.

As a population grows, farming becomes the least bad option.

And also beer became possible.

It looks more like agrarian society outcompeted hunter gatherer society because the agrarians got more surviving kids. This replacement and assimilation happened in Europe, for example, where it's visible in genetic and linguistic history.

Initially but the excess food allowed population to increase and the only way to feed them was to keep farming. So in a way humans trapped themselves.