Why do people say an arranged marriage is not a way out of being single?

Well there's no other way I can get married because I cannot even get a girlfriend no matter how hard I tried. An arranged marriage is like my last hope in finding someone in life. I'm vietnamese and this is normal in my culture. Plenty of people and including a few of my cousins got arranged marriages and they married girls from vietnam because they too can't find a girlfriend. Why do people say an arranged marriage is not a good solution to not be single anymore ?? I think it is a good solution in my opinion and cultural beliefs. I'm 20 and I'm tired of being single. I'm getting married pretty soon but I'm not going to announce my official wedding date to avoid wedding crashers. Seriously there are some crazy people on here who I know would go to my wedding and crash it if i tell my wedding date. I'm not going to tell anyone but my family of where and when i will be getting married.