Bedrock is not at all a router. They do provide a routing capability now, but at its core it's a wrapper around models so you can interact with any model with the same unique API.

> For example, I can't easily run models that need GPUs without launching classic EC2 instances.

Yeah okay, but you can run most entreprise-level models via Bedrock.

Only if you want them to go to random inference regions. God forbid you would want inference in a single region. Then you need to be satisfied with 12 month old models that have been superseded 2 times already.