So why isn't he untouchable? Here is the deep cut: Luffy has the potential for god-tier Observation Haki, but his personality actively nerfs it.
In a world where Katakuri can see seconds into the future and Fujitora can sense the gravitational pull of asteroids, Luffy’s relationship with Observation Haki (Kenbunshoku Haki) is uniquely... Luffy. Let’s dive past the wikis and explore the nature of the Straw Hat captain’s sixth sense. First, let’s establish the canon. Luffy did not have Observation Haki pre-timeskip. He had instinct —the "voice of danger" that allowed him to dodge the Pacifista’s laser at Sabaody, but that was nascent, uncontrolled potential. can luffy use observation haki
The proof? Luffy dodges Katakuri’s Mochi thrust by seeing his own head getting punched before it happens. He later uses this against Kaido to dodge Bolo Breath . Yes, Luffy can canonically see the future. So why isn't he untouchable
If you type "Can Luffy use Observation Haki" into a search bar, the short answer is a resounding yes . He’s used it dozens of times. Luffy did not have Observation Haki pre-timeskip