You can only advise on the information you're given. We're not advising in any professional manner, people can only give their opinion relevant to what they know, in this case that's Iun, not his wife.
As you say there might be much more to it but I don't think anyone's about to fly over to China, so unless Iun's wife joins the forum, you can only go on what he says and I personally see no reason to disbelieve him.
You say it's easy for someone thousands of miles away in a bedroom to dole out advice, what makes you think they don't have first hand experience in this very matter.
Again, it's all what ifs.