To a certain extent I agree, but to another extent, everyone worries about your ability to provide. It's just... a factor, along with the rest. Not to everyone, but to most people.
Well in the U.K. we have a very easy system that tells you age of the car based on the number plate. Despite this, very few women know the ages of the cars they see. If the car is clean and a good make, they don't know the difference. If not, a personalized plate hides the value to most of the rest.
Not when you're married, no... but when you're single? It's taken as an indicator of your wealth and status (whether consciously or not).