(hurricane-force winds in the Cairngorms, 2023, photos & captions by Northwoods)
nature is messy & can deal with messy circumstances. Trees fall, and lay fallen ... trees have fallen for as long as trees have been around. The fallen state is a state in which evolutionary processes have also operated within. So long as the tree lives to reproduce ... so long as it maintains its fingers in the soil ...

Many many many trees will cling on, grow upward with new shoots perpendicular upward from the fallen trunk. Fallen trunks & stumps naturally coppice, coppicing keeping them in a perpetual juvenile state and allowing the tree to live on for ages.

regardless of coppice or death, the falling of trees amongst standing-trees introduces habitat variety ... not all life celebrates in the old-growth forest. Some need the young shoots to eat, unable to reach higher boughs. Some need the torn-wounds of a freshly fallen tree for their spores to settle and grow. Some need decaying wood to burrow into, some need the wood-decaying-things for food.
A fallen tree opens up the canopy and sunlight reaches the ground, where sun-loving plants can now grow.

this is not devastation only, but would become so if we tidied it up ... but we didn't. So this is now both a breaking & an opening-up of space for new life.