And say goodbye to the girl of your dreams, who was really looking forward to showing her friends the "rock" on her finger and hearing them ooh and ahh over it.

Even if she doesn't leave you over this, unless you somehow married a Hackernews you've set up the image in her head that you're a skinflint who isn't willing to provide for your wife and it will affect your relationship in negative ways. Is your autism that strong that you will put a pedantic commitment to your own head logic and fighting the evil forces of marketing above your wife's feelings? If so, maybe you don't deserve to be married.