[member="sabrina"]
Popo is 2 metric tonnes of Hutt. The NPCs were also for flavor, not necessarily for NPC padding. They're just there to make cool sound effects and background noise. As for tampering with the repulsors themselves, they're hundreds of micro-repulsors mounted on the underside of Popo's armor. You'd need to seriously concentrate on them just to affect something of that size and that many. Couple that with Popo going at full speed (about as fast as a running athlete. The speed of plot convenience, really.) and the things being mounted in beskar, you're probably better off throwing things at him. Tossing him would require just as much concentration, but far more brute Force strength.