Of course with endorsements you can technically bring up the is/aught dichotomy. The facts may be what they are but that doesn’t necessitate any particular action. While this is technically true, I never see anyone complaining about the ethics of testing products and endorsing good ones. Wirecutter is basically doing the same thing with headphones and running shoes. Yet I only ever see pushback on political endorsements.
In short, umpires are neutral and fair but the fact that some teams win a lot more than others doesn’t mean they’re not doing their job.