Huh? That's like saying BMW chooses only to make high quality cars, so it's not fare to compare them to Kias. The comparison is completely valid, and is what helps people make decisions about spending more for a (potentially) higher quality product. If Apple's results were poor, then we would know that paying more does not result in a better ownership experience. Hyundai is a good example of a manufacturer who produces quality products that rank with the likes of Infiniti, Lexus and BMW, for a significantly lower cost of ownership.
Reviews and comparisons, from tomato sauce, to TV's and Printers, have generally always been about comparing similar products, not similar price. Consumer Reports compares all 4-door sport cross-overs together, be it BMW, Infiniti, Lexus, Ford or Kia. The same way they review all 15 inch laptops or 55 inch LCD TVs. Formatting rankings by cost would be tough. Is it for Laptops $700 - $999, or do you include the models for $1,050 too? Or should it only be for identical price? Additionally, Apple gets the same reliability and service reviews for is $999 MacBooks as it does for its $2,300 17 inch MacBook Pro.