It's you that's naive to think men can't just walk away from a child here in Thailand. I'm not advocating it's the right thing but I am telling you it's not madatory to support a child you've fathered in Thailand.
you need to expand your horizons beyond De Goorn described as a little village in Netherlands. So, if the laws are the same internationally why are Thais driving on the opposite side of the road to what people in Netherlands do?