On the one hand I agree with OP, guys are hitting way below what they should be here. Lots of guys go with the first girl they meet. I certainly did when I first got to China. Nothing special but way better than what I was doing before.
On the other hand, Asia is huge. Way too many people for a few guys to screw it all up. From what I've found its either the girl only sleeps with foreigners and most of her friends are the same, or it was because the guy made a move on a girl and its her first time with a foreign guy. The foreign circle girls are in some ways outside of their culture - maybe not in Thailand or Philippines.
On the other hand, Asia is huge. Way too many people for a few guys to screw it all up. From what I've found its either the girl only sleeps with foreigners and most of her friends are the same, or it was because the guy made a move on a girl and its her first time with a foreign guy. The foreign circle girls are in some ways outside of their culture - maybe not in Thailand or Philippines.