They can do it as much as ninjas are able to create clones, onmyoji able to summon real spirits, sappers pull stake traps out of their pockets, Scouts go literally invisible, Wugushi summon silkmoths from poison, Fletchers craft magical arrows, bokor summon actual zombies, Druids transform into animals and summon henge stones, priests cast holy light magic, and matadors summon bulls at their will.
It’s an exaggeration of the kind of mysticisms they’re supposed to be capable of, adapted to suit the gameplay functions they need to fill for the sake of fantasy, just like every other class in the game. However their historical inspiration is from an Australian aboriginal shaman assassin. Featherfoot often looked like it was flying at a distance because of the way they stalked their prey (combined with the way heat tends to shimmer off the sands in the Australian outback), and the bones they used were hollowed out and contained a dingo hair. They were pointed towards targets aggressively as if they were a magic wand, and the aboriginals actually believed they were being cursed due to the reverence and superstition they held for the shamans in their own culture. Once bone pointed, they would stop eating and die, believing their lives to be over. Furthermore, the footwear was made out of emu feathers and filled with human blood. They were made in such a way that the blood didn’t show on the feathers themselves, giving it a mystical aesthetic. They would leave bloody footprints to unnerve their prey, though these shoes also allowed them to move without making a sound (further making it seem like they were floating).
The ‘blood magic’ aspect of the class is probably the most uninspired part of their kit, but it kind of sort of works with the theme they have going, and the icon is a mosquito so that is probably the inspiration (mosquitoes are very common in Aus and can carry various life-threatening diseases like dengue and malaria)
I know you’re trying to make an argument for argument’s sake but you’re going to have to try much harder than that. Featherfoot is an icon from my culture as an Australian, so I’d like to see them done well. I’m also arguing on this point for gameplay reasons - all of the classes important to Featherfoot were moved to Scout, so it makes sense for Featherfoot to follow along in order to preserve their identity as a sustaining farmer class that pairs well with linker and thaumaturge. We now have easy access to curse in the wizard tree thanks to Bokor, so FF isn’t really needed any more on Warlock builds.