Well they must be on a different planet then. Alcohol works great in the cold and altitude has no effect. Now if you are talking about melting snow for water, then I agree that a white gas stove is the best choice only because of the raw btu output. But I don't camp where the only water is snow. And there's nothing magic about melting snow - alcohol stoves melt snow too.
I have a feeling that a lot of new hikers buy equipment for Everest, i.e. unrealistic expectations. Personally I apply the KISS to my equipment choices.