It isn't a commentary on quality. I think it is more along the lines of TNG being prim and proper while DS9 has all the fun adventures of Quark...
But if the shovel can kill a Bloodthirster, then your lowly Tyranids will pose little threat. Besides, I think you are missing the joke.
[ATTACH]
[ATTACH] [ATTACH]
You really seem to like these bonesabres. You can put your trust in bone, I'll place my trust in steel. [MEDIA]
[IMG]
[MEDIA]