Narrow gape hooks

A Japanese professional angler Takumi Ito came to pick up his boat yesterday.
When we were chatting, Gamakatsu / Narrow gape hooks caught his eye.

 
As he often goes fishing cover, he mainly uses narrow gape hooks.He uses the hooks even for ESCAPE TWIN.

Why he uses them??
He usually goes fishing in Kanto region.
Anglers there fish at close range and use a sweep hook set technique.
He said narrow gape hooks are perfect for sweep hook set technique.
They ensure deeper hook penetration and the perfect hook set.