I wouldn't call it fake news, maybe it is something you don't know, was mischaracterized or just misinformed. I wonder if it had anything to do with the first time he wanted to build a plant there? Just because we have not heard of it does not make it false. It doesn't meant it was true, either. Ask for more information!
Here is a link to the St. Louis Model T plant.
http://collections.mohistory.org/resource/145033.html'