I don't think it's just presentations or even corporate culture in general. I sell second-hand goods online, and have found that explicitly describing any defect completely torpedoes the sales process.
Having a photograph that shows it off clearly but saying nothing doesn't have that effect, though.
The more I learn about optimising the business for revenue, the more I come to understand that consumer-focused retail is essentially a socially acceptable form of prostitution.
We don't exist to solve a problem in peoples' lives, but to satisfy primal urges, indulge fantasies and make people feel powerful/special. The actual product you take home is just a souvenir.
Going back to GP's comment, I wouldn't be surprised if many corporate jobs could be looked at this way too.
Perhaps that is cultural? We're used to faults only being addressed when they're really dire; hence, if you address any faults, your product must be in a dire state.
In reality, that is probably the case, but it's also the case that any culture always moves in this direction; the nash equilibrium is reached only if you describe your product a bit too rosy.
Having a photograph that shows it off clearly but saying nothing doesn't have that effect, though.