First, the numbers I quoted were only for data centers: "The CFI identified around 140 (50 GW) data centres, the majority of which are likely to receive a Gate 2 offer. 71 (around 20 GW) data centres reported they have achieved financial commitment with FID."
That's 50 GW potential demand, of which I quoted only the 20 GW with financial commitment, to be conservative. That in a country where current peak demand was 45 GW, which is how I got the 50% number.
Second, the report says that the data center growth is primarily for AI: "The significant growth in data centres, driven by investment in artificial intelligence and the expectations for its economic and social potential, is a global challenge."
(What large amount of non-AI data center growth do you know about?)
Third, it highlights that while there will be other demands, these lag behind the more immediate demand for data center power:
"Data centres must be central to any solutions we implement. Data centre growth has brought into sharp focus the challenges within the demand connections process. However wider electrification of the economy and the associated rise in electricity demand, would, over time, have exposed these challenges. This would have made demand connections reform unavoidable."
There is no way to get from those numbers to conclude the AI power use per capita per diem is "a tenth of a kettle of tea."