because marriage is not actually sacred. Its a contractual agreement. Maybe 100 years ago it was but now anyone can get married (except gays) and get divorced in 6 months or less. My personal feeling is that people get married more for financial security, to start a family, or because of social pressure. If that were not the case then why do 60% of marriages end in divorce? People are obviously getting married for the wrong reasons. I am happy for those who have made marriage work, and I think gay people should have the right to get married, but I dont see marriage as "sacred". It can be of course, but to a lot of people its not. At least not anymore.
By the way I think all of the bride shows, and dress shows, and wedding planning shows do SO much harm to society. Now women want to be a "princess for the day" and they want to plan this big extravaganza and they want the perfect wedding photo album. For some people weddings are nothing more then the ultimate party.