A POTS telephone line, which is what we're talking about here, can handle being cut and reconnected without a fuss. It would appear the elevator guys did not notice what they had done or did not understand its importance.
I agree. But if a field tech knows that a low voltage line is incorrectly in his work space and that someone will fix it if he does cuts it, then the tech may just cut it and let someone else deal with the problem.
I would be a little concerned about the safety of that elevator.