Imagine if you had a Netflix subscription, and still had to pay for every movie you watched. This is what Stadia felt like to me.
For a non-Google example: Costco and their roasted whole chickens they sell for $5 USD each. There is no fucking way Costco makes a profit, let alone break even, on those, but they do it and run the red ink anyway because the customers that come to buy them will also grab other stuff on the way out, generating black ink to offset and surpass the red ink.
Streaming a game requires an actual real GPU being (I guess) exclusively used by that customer while they're playing. Not feasible to put those in edge locations.
Completely different set of costs.