I agree with that. But I don't think your effectiveness with a weapon should be affected by your survival skill. If anything, you should get bonus damage against wild animals, from your survival skill. Definitely, your ability to craft weapons like that should be governed by survival. Especially weapons made from animal parts (mantis, deathclaw, etc.); but as far as I know FNV has no weapon crafting other than bombs. I could be wrong about that... I actually never bothered to use any workbenches, or look at all the "recipes" for crafting stuff.