I married a Saigon bar girl 54 years ago. At the time I encouraged many of my friends to do the same. I and they are mostly still married to the same women, all have children, grand children, homes and bank accounts...some have helped their wives bring family members over to Oz! Some marriages fail, after all they are between men and women, we're all human!
To judge all on the choices of the few that have failed is nonsense, remember, my friends and I married Vietnamese and Chinese women, they are not the same "culturally" as their Thai sisters? In every case, you take your chance? All of life is a gamble!