The other rule that you need to take into consideration that they could be calling as well is <G41>:
<G41> Detaching MECHANISMS - ROBOTS may not intentionally detach parts or leave MECHANISMS on the FIELD. Violation: PENALTY for each incident and potential RED CARD if an intentionally detached COMPONENT or MECHANISM impedes MATCH play.- Bumper covers must not detach, even unintentionally, from the ROBOT. Violation: PENALTY.
I agree though, that teams should not be penalized for their robots breaking and pieces like chains, treads, nuts, bolts, etc. Although for larger pieces and objects on the robot like arms, shields, etc. should warrant an intitial warning and then possibly a penalty in subsequent matches if teams do not fix the problem. Teams should not be prohibited from playing the game because another team did not secure their mechanisms well.