Have you studied control systems? Adding a second storage mechanism with different dynamics changes control, and may complicate it. Those muscles may increase hypoglycemic events as well as soften spikes.

As much as we like to think in abstractions, the tail does not wag the dog.

You may intend to lift weights to gain muscle, but the body is doing a lot more than just gaining muscle. It's interesting to see what else happens. That is the point of this discussion.