It's a lot more complex than all this as well.
Simply using blockchain for secure accounting and payments will be a viable model in many instances.
But this is also akin to using a centralized exchange of sorts.
This would not matter as much if the tokenomics of the system were actually correct.
But a game will never be decentralized unless multiple nodes are running it.
And on this note even HIVE is completely overkill.
Hive has over 100 nodes.
It's possible we need to create sidechains to run these games with something like 3-5 nodes instead.