Lmao Even blind man now luffy is hakiman. 2 years training solely for 3 haki colors, after TS oda creates every arc specific for him to master adv haki.
No single character that has same rate growth or development in one piece like luffy, in every aspect and department. Luffy shits even on the like wb or roger.
Zoro more hakiman? He couldnt even KOed lucci after 20+chapters with 3 swords. Luffy knock the shit outta him with bare hand lmao.
Can zoro split sky from his haki? No
Can zoro knock thousand ppl with his haki? No
Future sight? No
Internal desctruction?...
Luffy easily covered entire mountain size hand with not just haki but adv haki lol