Shinobi ESP isn’t the same thing as electronic sensor systems. Shinobi being able to bypass another shinobi’s projected consciousness, doesn’t automatically mean they can bypass non-biological detection systems. A Pacifista isn’t relying on neurological awareness at all. It’s a weapon equipped with mechanical targeting systems, battlefield data analysis, and automated lock-on tracking. It doesn’t sense chakra or depend on mental perception. It detects physical phenomena like thermal signatures, motion vectors, sound displacement, and environmental changes.
Sasuke hiding from a human brain processing chakra signatures is fundamentally different from hiding from a machine that doesn’t blink, doesn’t get distracted, has no cognitive blind spots, and processes multiple inputs simultaneously at machine efficiency. Substitution also doesn’t solve this if the Pacifista never actually loses tracking data.