Cloud gaming is being pushed because its good for companies. Not consumers. Oh, sure, it's good for SOME consumers, who don't want to/can't afford hardware but want to run games well (but also have good internet). It's also good for gaming high-quality on the go.
But make no mistake: companies are not altruistic. Do you really think they care about helping anybody or making anybody's experience better? Hell no. Cloud gaming puts literally ALL of the control of EVERY SINGLE GAME into the hands of a few companies. All control is removed from the player -- every little bit of it. Wheres you can access many Steam games offline or even without the launcher being open (Steam does not require DRM, just so everyone is aware), there is absolutely no way you will ever access your cloud library again if your account is banned, or if the service shuts down someday. You cannot edit .ini files, you cannot mod your game, you cannot do any of the things you expect to be able to do on console or PC.
It's a dangerous idea. It's almost Orwellian to me. And I will not support it under any circumstances. Buying games on Stadia or similar services is the equivalent of handing over control of your media to giant corporations. There's not even a value proposition here, because on Stadia in particular, you still have to buy the games and the subscription.