One of the commenters outlined it pretty prestinely. Data centers have exceptional power usage efficiency. PUE and water usage is the bottom line at AWS, if there is a leak, we fix it, if cold air isn't going straight to a rack we fix it. We revise temperature set points up and up seeking to not spare a watt of energy the racks don't need for cooling. Processing power is oversubscribed to keep everything running at its limit. There is no comparison with smaller scale solutions which fail at all of these points; and no matter how much of a sovereign individual you think you are, its unlikely your daily life does not depend on internet infrastructure, the last time there was a major issue at amazon it grounded all US flights.