Probably the ugliness. I've seen great landscapes being heavily damaged by wind turbines.
Windmills are a bit of an eyesore compared to a great natural scene.
I'd rather go nuclear in select ugly places.
What is beautiful is good. He who creates ugliness is evil.
Beauty is in the eye of the beholder.
Also, I have a deep aversion for relativism.
Nuclear is better, though, in the short term.
However what 2+ degrees of warming will do will dwarf anything that the turbines will do.
There are also arguments about birds dying and the such. Only that's a BS argument considering that glass buildings kill 10x as many birds and are ubiquitous.
Also, nuclear has the whole radioactive waste and potential meltdown thing, which wind does not.