I'll start of by saying the author has provided some nice research. However, this particular example is the kind of thing where it doesn't even really matter wether its legitimate or not. The fact that it doesn't attribute it to any particular source makes it almost meaningless. It's basically just saying that some person 100 years ago said "X".
Does it really matter if I have a source for that? This content is clearly not meant to convince, only entertain.
Does it really matter if I have a source for that? This content is clearly not meant to convince, only entertain.