this is CD not shutting up about the Prometheus class

[ECSNorway]

Maybe, maybe not.
It's possible that the torpedo is simply set up with its own microsecond shield modulator that simply phases right through the shields.
Go back and re-watch Generations; what weapons did Lursa and B'etor use when they attacked Enterprise after they got the shield modulation code from Geordi?--
"Use of unnecessary violence in the apprehension of General Zod has been approved."
--
Sucrose Octanitrate.
Proof positive that with sufficient motivation, you can make anything explode.

[Florin]

Ah yes, I'd forgotten about that.--
"Ah, so now we know who the donkey is in the family. And where the donkey pulls the cart, the ass is sure to follow."
Jack Russell, Radiata Stories
--
If you become a monster to put down a monster you've still got a monster running around at the end of the day and have as such not really solved the whole monster problem at all.