Yes but if we all followed that logic in life then why buy a BMW/Audi/Jaguar etc etc when a Vauxhall Astra would do the same job for considerably less?
Sometimes, just sometimes in life do we not all aspire to owning something 'special' or just 'nice' just for the shear hell of it? And whats wrong with that? It would be a pretty dull life otherwise.
I'd like a Breitling and one day I just might buy one. Would that be a sensible choice? Of course not but I'd rather spend a couple of grand on one of them than having to buy years worth of nappies for a baby or a useless ring for some chick!