That’s because if you praise a terrible toaster, life for most Americans is unaffected. If you endorse a political candidate, and nudge the election in one direction or other, roughly 50% of Americans will see that move as hostile.
The principle is the same though, whether you’re recommending candidates or toasters. Just because one has more impact than the other, doesn’t make it less ethical to investigate and recommend.
Your last sentence isn’t grounded in reality. Negatively impacting the lives of millions of people is less ethical than negatively impacting the lives of a few.
