It's absolutely amazing to me that the quality of the average Robinson pilot is such that Robinson has produced no less than two related "safety notices" that cover this exact situation, 41 and 44,
https://robinsonheli.com/robinson-safety-notices/
To me these sort of safety notices are the equivalent of "coffee is hot".
That said, when I was still struggling to tune a radio without bobbling about, having a door open definitely required very careful consideration. I've never had a problem talking a pax through this the few times I screwed up and let it happen, but there are pax and then there are pax. It's really too bad that this pilot made a very reasonable decision to land and sort things out only to suffer from a mistake doing exactly that