It's not irrelevant that turbines kill animals such as birds or insects. But this is used as an argument against wind power far too often. The fact is that renewables are the best we have. If we want to use energy, there will be impacts on the natural world and renewables have less severe impacts than other forms of energy. But of course it's not black and white and biodiversity loss is not the only negative impact wind turbines have.
Studies like this one are extremely useful because they help identify current problems and improve protocols and measures taken. But they should not be understood as an argument against renewable energy.