We thought it would ensure our robot didn't fall off the bar from swinging during the climb. We were also trying to avoid using pneumatics on our bot to save weight and because they were not needed for any other subsystem, so we thought active hooks would be simpler than putting a gearbox at the base of the arms. But, after running into issues with the active hooks at Ventura and seeing other teams use spools to actuate their swinger arms, we realized changing to passive hooks and making our swinger arms active using a spool would work better, which is why we switched to that for Monterey.
