There's elevators, gears, levers, belts and chains and stuff in there. Pinsetters are full of pinch hazards and move multiple pins and balls around at the same

There's elevators, gears, levers, belts and chains and stuff in there. Pinsetters are full of pinch hazards and move multiple pins and balls around at the same time. It's not a trivial amount of force, especially if you consider how the tension in a chain translates to a crushing force if you get in between a sprocket and chain, or how the the force in a 1m long arm lifting a 1.5kg pin translates to a crushing force at the centre of rotation. Not to mention the machines are beefy and have to withstand parts of them being hit by 10kg bowling balls. A quick google search indicates a pinsetter machine weighs more than a ton. You could easily lose your shirt, finger or get your hoodie strings caught in there. You'd have to be unlucky to die but it's happened. "Just restricting the force" doesn't work because the force at pinch points will be huge in normal operation and the extra force to slice your finger off at a pinch point would be noise compared to all the other forces.