In my experience these onboarding session would be completely unnecessary if processes would be well documented. In reality often the only way at many places ho

In my experience these onboarding session would be completely unnecessary if processes would be well documented. In reality often the only way at many places how you can find out about "how I do this specific thing?" is to ask a person who somehow knows (good look finding out who knows). So instead of having good documentation of how to do stuff or whom to ask, they have an onboarding session so that there is a chance that at least one person in the new group remembers this minor fact out of this huge amount of information that put in front of you that you thought you'd never need. It's quite literally the equivalent of throwing s*t at the wall.