Have you ever been there? The land in that area is rock with about an inch of soil on it, like most moorland - it would not support a forest, it never did(within the last couple thousand years anyway) . Romans didn't build the hadrians wall through a forest after all, the area was already barren then.
And no one is directing me to feel angry - the tree did hold a special place in my heart, I've been to it with my dad shortly before he died, I've been there with my wife(then fiance), with my friends and family, it always felt like a pilgrimage to anyone living in the North East - and the fact that it was destroyed for literally no reason whatsoever makes my blood boil.