Fair point - although there are already so many customer facing chatbots using LLMs rolled out already. Zendesk, Intercom, Hubspot, Salesforce service cloud all have AI features built into their workflows. I wouldn't say penetration is near the peak but it's also not early stage at this point.
In any case, AI is not capable of fully replacing customer care. It will make it more efficient but the non-deterministic nature of LLMs mean that they need to be supervised for complex cases.
Besides, I still think even the inference demand for customer care or programming will be small in the grand scheme of things. EVERY Google search (and probably every gmail email) is already passed through an LLM - the demand for that alone is immense.
I'm not saying demand won't increase, I just don't see how demand increases so much that it offsets the efficiency gains to such an extent that Oracle etc are planning tens or hundreds of times the need for compute in the next couple of years. Or at least I am skeptical of it to say the least.