Indeed - stick me in my pod and inject those experience chemicals into me, what's the difference? But also, what would be the point? What's the point anyway?

In one scenario every atom's trajectory was destined from the creation of time and we're just sitting in the passenger seat watching. In another, if we do have free will then we control the "real world" underneath - the quantum and particle realms - as if through a UI. In the pod scenario, we are just blobs experiencing chemical reactions through some kind of translation device - but aren't we the same in the other scenarios too?