No, they typically don't burn the same regions. The crux of the matter here is that getting forested areas to the point of being able to do controlled/prescrib

No, they typically don't burn the same regions. The crux of the matter here is that getting forested areas to the point of being able to do controlled/prescribed burns is going to take an insane amount of effort and is only happening to a fraction of the forest needed to keep things under control. You can't just go start a fire in a forest and hope it goes well. You have to manually go through and clear the brush in the understory, or else the fire will be so hot it will burn down large trees. Once you've cleared much of the small woody brush, etc that causes these fires to be absolutely massive, regular fires will typically be much more mild and continue helping keep the forest understory clear without requiring much manual labor. It really is pretty effective, but it does require lots of little fires quite frequently.