Yeah I thought he's more amazed that people apparently just take stuff off of wikipedia and start manufacturing it without cross-checking with a single other source...
He is. Flags are a market with a necessarily huge selection, though - why wouldn't they snag every legally available design someone might buy? They probably manufacture the less-common selections on an as-needed basis, after all.
Several years ago I updated a particular Wikipedia puzzle writeup and included software to generate the (nontrivial) puzzle artwork. At which point I got my hands slapped (there should be a verb for that), and was told Wikipedia was not a code repository.
Evidently Wikipedia is also not a repository for original artwork.
I suppose there's some sense to that, what with the high price of storage and countless contributors wishing to upload original works.