Should we let wildfires happen?

most likely not

Explanation:

the animals are loosing their habitats

Well logically no.

Explanation:

It's obvious that wild fires get enermously destructive just by small flashes within no time and that's just not appreciable. But as we go on knowing deep down the biological status there we might be encouraged in creating wildfires.

This is so because wildfires also promote the fertility of soil by fire treatment processes.

Hope your question was answered.