The "safety briefing" 10 minutes before, and the huddle prior, are just CYA. Their briefings are a joke and we've all seen the "huddle" where they show up, with their earpods on jamming to their music, just so it looks like they do it.
The ramp guys are woefully undertrained and as we can all see from the excerpt from the manual (which they don't read), AAG is just trying to cover their butts. That's their modus operandi on these. "Oh, the manual did say you can't do that, it's on page 387, and you signed this form where you say you have read and understood it".
Just look how bad the ramp operation was. Cargo door was opened (by a different ramper) while Eng #2 was still running (almost everyone who has flown in the AA system has seen that), and the poor ramper walked along the leading edge straight to a running engine. This is a systemic issue, but they are trying to make it look like it's just a ramper who didn't do what she was told to do.
This is what happens when you penny pinch, hire rampers on minimum wage under regional contracts, and train them by a computer module for a few hours.