Why do they do this? It happened to me 4 months ago and my partner today (both European flights). A pax on board needed medical attention so on landing they held all other pax on board until the paramedics arrived and treated the person. Why?

Surely the person who is ill wants privacy, not surrounded by gawping other pax invading their privacy and desperately trying to find out was going some, some even taking pictures today according to my GF - yes seriously!! The paramedics took around 15-20 minutes today to arrive, during which time the rest of the pax could have easily got off. Plus surely the paramedics want space and privacy too to attend to the pax, why would they want to be surrounded by rubber necking pax trying to see what is going on?