It’s mainly the lens size. It has a wide zoom range with a servo rocker (zoom buttons) and can par focal* (focus at one zoom range and stay the same focus when zoomed out)

Then it’s a massive battery on the back and an audio kit strapped on the side. Then sometimes streaming device to live broadcast. Then you got a shoulder pad on the bottom and a big viewfinder for daylight shooting. Strip all that away the body isn’t as big and heavy as you think. So largely all operational to be used running around without needing to stop and change gear.