My first impression of the windswept bucolic views of Scotland is,
"Why aren't there any fucking trees?"
Was Alba always barren of flora or did cutting down the forests in ancient times for firewood change the landscape forever into eroded coastal dunes where nothing will grow?
Actually, it's a long, complex story. 1000 or so years ago, Scotland was mostly forested. At the other end, the Highland Clearances in the 1700s and 1800s didn't just force most of the people out; the major intent was to clear the land for sheep farming, which had become a good income source for the landowners with the development of modern cloth-production techniques. This led to the conversion of most of the countryside to grazing land, eliminating most of the remaining trees.
But that was merely the last blow. Before that, the forests had been heavily mined for wood for shipbuilding, and for producing charcoal to power the growing factories.
It didn't help that Scotland (and Ireland) was on the edge of the tree-supporting area, with the tree line roughly along the northwestern coasts. This meant that the forests were naturally rather slow-growing, and the tree species weren't the largest. So it was easy to over-harvest them if there was any sort of profit from the wood or a more profitable use of a tree-free land area.
Do a bit of googling; you can find lots of info on the history scattered around the internet. Similar things also happened in Scandiavia, so you might look for histories of forestry there as well. But the people there were mostly along the coastlines, and the center had much taller mountains, so the forests survived a lot better than in the British Isles.
The summary is that the treeless scenery of much of Scotland isn't at all natural; it's directly attributed to human "management" of the land. There's plenty of evidence that it would have been mostly forest without its human population, at least for the past 5000 or more years as the last Ice Age slowly faded out..