Because then we'd see articles about how the next start up missed their opportunity whenever their site unexpectedly got discussed on the latest Rogan episode and subsequently was taken offline by the limits being tripped.
There's no "right" answer. In one case, it's checked the wrong box and got a $14K bill. In the other case, it's I checked the wrong box and my startup missed its one window. There are in-between levels of alerting etc. for both populations but they're probably unsatisfactory for the extreme conditions.
To be clear: I'd be very in favor of the major cloud providers having a "DO NOT! DO NOT! use this for production mode and your content could be deleted at any time if you screw up. But I suspect most people wouldn't use that."
I don't see the problem. Don't set a budget limit if you don't want your app to go offline. Lots of people wouldn't mind if their app went offline for a bit. They'd prefer to not suddenly get a $10,000 bill
To be clear: I'd be very in favor of the major cloud providers having a "DO NOT! DO NOT! use this for production mode and your content could be deleted at any time if you screw up. But I suspect most people wouldn't use that."