Well, the OP was talking about putting mages in danger by having a THF (potentially with hate) run over to them to activate these JAs. The JAs have a 12.6 yalm activate range, but work on any monsters in a circle with radius 20.6 yalms around the target. So the issue is not the effect range (which is sufficient and would cause the increased server load per use if increased), but the activation range.

Assuming the Community Rep knew what they were talking about, their statements indicate that Accomplice/Collaborator ranges are small so they won't be used as much because they cause unreasonable server load when used under the current conditions.