haven't the last three Lynx fatals included personnel that didn't need to be on board? - Rotate Too late
The fact that passengers were on board isn't the point, after all, it's what SH/BH does. It's what you do with them and why.
The Basrah crash had pax on a famil, but entirely legitimately as it was the incoming boss. Pax rides are great for familiarisation of role, or just a little reward to those who deserve it. If conducted correctly, they are worth their weight in gold. However, if they lead to a bit of showing off, or they're allowed to do something that they're not trained to do (firing the crew-served weapon - now banned in JHC orders), then you're exposing them and the crew to unnecessary hazards.
Risk assessments are often sneered at as 'H&S gone mad' but they are there for a reason and they can save lives.