The goal is to, first of all, help companies understand the climate footprint of the AI that they use, measuring to help them make more informed choices, for example, and shifting to regions with more renewable energy and greener compute and putting consumer pressure on AI developer companies for transparency. If enough people or organizations that are using AI ask for these numbers, the AI developing companies will have little choice but to provide some form of transparency, which we're currently missing.
The excuse is that people aren't asking for it, so they don't provide it. I think the time has come for the AI industry to be more mature and to push for this transparency, as we have done for other things like transportation, food and things like that.