To be honest.
I think it was, and still is a bit of a Thailand myth.
To make stronger beer, it takes more time and it takes more ingredients.
I cant see them making that mistake on a production line.
but saying that, you do need to stop the brew process to be able to keep a consistent alcohol level in the product. so possible something there.
Who knows.
But it's still a good Thailand talking point over a few cool ones..