Nope.
AdvCoA is much harder to achieve per Luffy's example.
Shanks can use Kamusari at age 15, which is an Internal Destruction AdvCoC technique.
I say at age 15, Shanks already knows how to use all kinds of advanced haki.
This is what you get when a protégé gets to observe top tiers in Roger and Ray from since a baby. He was probably taught too.
Luffy would be the same had he become a Marine and was trained by Garp from since a kid.
Look at Koby's growth.
AdvCoA is much harder to achieve per Luffy's example.
Shanks can use Kamusari at age 15, which is an Internal Destruction AdvCoC technique.
I say at age 15, Shanks already knows how to use all kinds of advanced haki.
This is what you get when a protégé gets to observe top tiers in Roger and Ray from since a baby. He was probably taught too.
Luffy would be the same had he become a Marine and was trained by Garp from since a kid.
Look at Koby's growth.