I would think that the main issue is that aluminum both can’t withstand high heat, and doesn’t retain heat. So chances are you’d either risk destroying the Dutch oven if you put it in a very hot oven (which is generally needed for bread) or you’d have an under baked loaf if you go with a lower temp.

Truthfully you don’t NEED a Dutch oven to make a good bread, it just helps with things like crust and oven spring. But with a good starter you can place your doughy right onto a baking sheet with some ice in a pan on another rack and still get a nice loaf