If by NEED you are referring to being necessary for hunting,... then no, there is no real NEED.
But I NEED to buy more guns, therefore I will NEED to buy me a BAR, An M1, A Swedish Lungman, and maybe a FN49. Just cause I have a NEED to shoot many different guns.
I hunt with Bolts now. But before my gun cabinet was so full, I would occaisionally hunt souther Michigan with my old browning A-5 stuffed with buckshot. Worked fine then and would probably work fine now. Never had a jam. Folks with auto' s need to learn that you only need to oil for storage. Clean and DRY is better in the field.