Maybe we miss the point here. You can't argue the science behind transistors is correct (or, at least, the engineering) but you can show how bad things end up when we start recommending eugenics.

The central idea of eugenics - that we can control our evolution the way we did with dogs or cattle - is not inherently flawed, but I wouldn't trust the evolution of our species to its current members. Before we think about building a better mankind, we need a better mankind.