Hi Penko,
The QRH is written around the most likely scenario conceivable, then updated after an incident.
A fuel tank will usually develop a leak if it's damaged by debris from:
1) exploding engine (Qantas A380, Airtours 737 JL @ MAN)
2) tyre debris etc. (Concorde,)
I can't imagine why a fuel tank would suddenly develop a fuel leak mid ocean. However, if it did - I like your logic.