It's not like Zidane's going to stop Asterios, and though there's attempts from the poachers to slow him, it's not enough. The nearly-headless gashadokuro becomes fully headless at the next furious assault; and even if it could've survived without, it's nothing with its body smashed into pieces.

Now that gets the other gashadokuro to attack and try avenging their fallen, the goblins coming in short pursuit because without the skeletal demons, their poaching efficiency would drop significantly. But what efficiency could they possibly hope to retain when the thief proves too fast and could cut them down before they could provide any support. No, it looks like the two gashadokuro that remain would be left to their own fighting Asterios, and they'll swing their massive bony hands at the minotaur in quick succession.