That seems... Pretty reasonable? Like Anthropic is at $45B annual revenue, let's say they enter next year with $100B annual revenue? Let's say they have 30% gross margins (no idea), so $70B goes to data center owners/operators. That's one company doing roughly 1/3rd of what's required to pay the investments off. And you have Ant+OAI+GDM+Internal AI at GOOGL/META/etc.+all the servers for open models.
I'm sure there's a world where you can paint a picture that requires $5-10T but that would require capex increasing significantly NEXT year. And the cloud companies won't do that unless revenue keeps growing.