Why not? Both is being used by people. Both are the gaming category.Why would the mobile market mean anything regarding consoles? How about looking at the much more closely related PC market?
I'm not sure I get why the more closely related PC market should is different.
The PC market is 100% digital, too and people are used to it with good digital marketplaces.
But the PC gaming market is not used by as many people in Japan as the mobile gaming market. The argument however would be the same