Vegetation is the enemy in forest fires, for example. One of the main reasons that lone house survived the Maui wildfire[0] was because they properly managed vegetation, which prevented the embers from setting fire to the property via a bush that's way too close. Nothing prevents you from letting the rest of your backyard go wild if you prefer, but keep it away from your walls.

[0] https://www.npr.org/2023/08/24/1195331310/red-roof-house-fir...