But $465 million as part of the bootstrapping/rnd budget for some new gpu-adjacent compute offering would be pretty easy to justify ... and potentially being able to move some of the development cost associated with that new cloud offering out of aws and into some other budgetary boundary is almost certain to provide stock boosting effects.
It seems obvious to me that the tech companies with streaming platforms have started using tv/movie production budgets as a way to fund research into offerings appropriate for development teams that are highly-creative/technically competent/and driven by result oriented pressure. Adding value to the production stacks used by those kinds of teams is hard but also technically worthwhile and pretty measurable. And having discerning and hard to please customers as early partners/beta testers for a new service could be very valuable.
I suspect Apple is doing this kind of thing as well with their shows where you can see the same or similar high-end visual effects appearing on multiple of their shows -- feels like the kind of thing you'd expect to happen with different creative teams using converging 'in-house' tooling ...