Google isn't the only player in the AI field. The paper is about the entire field in general, not just what Google is doing. And plenty of the other companies

Google isn't the only player in the AI field. The paper is about the entire field in general, not just what Google is doing. And plenty of the other companies in the field have not made similar pledges. The total amount of electricity being used so far for training models does not yet move the needle in a significant way, but the point of the paper is that it's currently growing in an unbounded exponential fashion. And you know how exponential functions work.