Indeed it does. It’s ground beef that needs to be cooked throughout. If any bacteria is on the outside surface of a steak or roast cooking it to any basic level of done-ness will kill that bacteria, such as searing to medium rare on a steak or roasting a roast to medium done-ness.
It’s the grinding process that incorporates bacteria throughout the meat and makes the burgers need to be free of pinkness to prevent illness.
These burgers were not cooked through.
I will never eat a burger unless it’s rare to med rare.
I’m 76 and have never had any food poisoning.