Hi,
Whow - great, very informative - this deserves a +Rep!
Maybe you just wasn't clear enough about the
tailoring refiner, a vital tool for any hunter - it transforms Animal Hides into Generic Leather, drastically reducing the weight.
So any hunter always should carry one.
As any miner always should carry his holy trinity of "Finder, Extractor & Refiner" for Ore and/ or Enmatter, whatever he's after. Ahem, carrying some bombs respective probes also would be a good idea, too ...
The refiners are great to prepare materials for crafting or further use, but the best feature they offer is to reduce the weight of the loot. This makes them indispensable to anybody hoping to loot something refinable.
It's just no fun to carry 1K of Animal hides (100 kg, 1 PED TT), or similar loads of Lysterium or Oil - they slow you down to a crawl. Refine it, thus drastically reducing weight, and carry on whatever you're doing
Have fun!