They aren't dismissing the argument. They're saying pretty plainly that both things can be bad, and therefore both can be addressed simultaneously. Taking the stance that animal welfare activists can't care about anything else until the insanely divisive issue of factory farming is solved, on the other hand, is being dismissive of the issue at hand. It's whataboutism. Moreover, someone might take issue with animals being sacrificed for Neuralink while being okay with animals suffering for human consumption. Such a take would be nuanced, not hypocritical.