>>96730480
Current GSCs have a very big guerilla warfare aesthetic going on and it really did seem like the design team wanted to incorporate an element of general rebellion and revolution within 40k that was missing in most other factions while making them a bit more redeemable than chaos cultists, in fact they fill the niche of armed revolutionaries way more than chaos cultists who fill the spiritual weird cult shit way more than the faction with "cultists" in their name
Dying for an impossible cause that was doomed from the start in hopes for a better life is fucking badass though and having them end up being consumed by nids at the end of things, while certainly being at least somewhat comical, is absolutely in line with the blatently hopeless unfixable reality of 40k as a setting where even if your guys have good intentions standing up agains't the blatently bad and unfunctional imperial governing bodies it will all amount to nothing at the end
Also in general the way their ground troops and man have mutations, synaptic communication and other shit exclusive to the nids makes them a way higher threat to fight and just way cooler in general