The issue (it’s relative of course) with those use cases is that they are fairly centralized. Hive Engine contracts are not smart and if you want custom code you need to bake into the code with approval of their witnesses, instead of writing a contract like Ethereum does with Solidity.
Hive is used by those apps as a messaging railway where people post the JSON string code of what they want to do and their servers validate and update the data on their servers itself.
So for example if you want to check someone’s NFTs or game tokens you can’t check Hive because the data is not reliable, it is not reliable because it only stores the data and does not process it (so someone can spam the same JSON command in a game but on the game server nothing happens because the server deems it invalid), so you need to query the centralized servers to validate the information as anyone can broadcast and store any JSON on Hive.
So games on Hive are not yet really decentralized. There are people working hard on it but looks like this is a big task IMO.
Fair points!