Men looking for women have been coming to Thailand for many years. Some of them do no research and are happy to trust mates down the pub in their own country that the girls here are easy, beautiful and often charming - most of the "easy" ones to be found in bars. In fact these women represent less than 4% of Thai women. though for sure, there is no guarantee that many of the 96% remaining might just be lying about one being handsome!
Arriving here for the first time, they are amazed that their mates were (partly) right! These men are of different age groups but they often have in common a few background characteristics that tend to make them easy prey for those women. In the beginning, the men are overwhelmed with the feeling they are wanted and cannot resist the temptations of "falling" into relationships that were impossible in their own country. It is easy to see why!
Men who are not familiar with the major potential problems of a serious relationship with a bar girl, especially marrying one, will be naive at the time and later realise they were stupid.
To the OP: Is Mrs. Smith aware of your deep knowledge of the bar girl scene?