[CamperBob2]

like many other lease clauses it is there to assign blame in case an exceptionally bad event comes to pass

That sounds like a job for the insurance company. You do have insurance, right? Did they have any input on this clause?

[jeffbee]

They dictated it.

[CamperBob2]

Interesting, and ominous. If the place burns down and they find the remains of a "TrustFire" battery in the debris, they might try to refuse coverage, leaving you with the task of recovering damages from the tenant. And good luck with that...