It's not the product - it's the people who buy it
Consider the sort of person who, in your opinion, buys Apple products. Would you like others to think you were like them? If your view of the products were positive and you viewed the sort of people who owned them in a positive way, you're more likely to buy that same stuff than if your impressions were negative.
It doesn't matter what the product is: everything ever made has good features and poor ones. Which ones take precedence in your mind has nothing to do with the features themselves, but is about the sort of people who extol or criticise they. Primarily the early adopters and reviewers. We see a certain "type" of individual taking up polarised views about a product, a company or a political opinion and we either wish to associate or distance ourselves - not from the product but from those PEOPLE.
In that respect it's not like religion, which has no rational explanation and is universally recognised to be about faith. However, religion is also about social norms and social pressures. Factors that don't come into play with Apple, or IBM or other I.T. products where we can see lists of features and testable properties that we can make choices about - even though we don't.
