Africa gets a lot of jobs they would otherwise never get. How is exporting your labor something bad? Countries try hard to get more exports, but once an African country does so, it's bad all of the sudden.
I think the answer depends on how well labor in those countries is rewarded for working at such facilities. So I certainly hope countries that are considering hosting those projects drive a hard bargain on price, starting by acknowledging that what they are giving up is real. The land use is a real concern, yes even in the desert.
Could you probide some examples of these concerns?