Beans have indigestible carbohydrates in it, which makes you gassy and bloated. But since these carbohydrates are water-soluble, soaking them first helps. Soaking and then cooking the beans will break down the carbohydrates and makes it easily digestible. Soaked beans also cook faster.  So even though this requires little prep and effort, it totally is worth it. Preferably do not skip this step.