In reply to Only a hill:
Wind farms do not destroy the biosphere (!). They have only a minor, temporary impact. Even when they are built on peatlands the impacts need not be severe although that will depend on the details of a given proposal and the care taken with surveying & construction. Some species actually benefit from turbines which protect them from raptors. Of course the flip side of that is the hazard to birds of prey. That is real but not disastrous for any given species.
Turbines will not be a permanent feature of the landscape. One might expect that future technological developments will lead to a gradual reduction in land-based wind. Perhaps the era of extensive upland wind farms would last for a hundred years or so and then die out as turbines are decommissioned and not replaced.
If you are going to make a conservation argument, you also have to factor in the risks of climate change. For example, a mass extinction is threatened which could see the loss of perhaps a quarter of the world's species. Maybe more. For example, half of all US bird species are believed to be at risk of extinction due to climate change.
From the fossil record, we know that it takes several million to several tens of millions of years for biodiversity to recover after an event of this kind. The fossil record also suggests that a large mammal like homo sapiens might expect to survive for a couple of million years or so. Thus, the relatively denuded world we are about to create might endure not just for a few hundred or a few thousand years, but very likely for all of the rest of human history.
It simply isn't possible to mount a serious conservation argument which could trump that. The only "long-term" impact of wind farms will be the access roads which they leave behind but even these will be re-absorbed by the landscape relatively quickly over the centuries.
UK peatlands are specifically threatened by climate change. A warmer climate could end the growth of new peat across most of the UK, except for a rump area in the NW of Scotland. With no new growth, the peat is vulnerable to extreme drought events which gradually nibble away at the bog until nothing is left.
That of course is just one relatively minor effect of the pending global environmental catastrophe. You asked if it's worth scattering wind turbines across the Scottish uplands (which do little real harm except to the view) in order to avoid that. Well yes it is: as far as prices worth paying go, that's an absolute bargain.