Right from the outset this is made clear. The watch being talked about hasn't been donated to a museum of watches, it has been donated to a museum of capitalism. Even the title was chosen to make it entirely explicit where they were going with the article.

To then say that people shouldn't comment generically about capitalism regarding an article that is explicitly about capitalism, would seem a stretch too far in trying to keep this place neat and tidy.

I felt it was a bit like if everyone were to be restricted to discussing pencil manufacture, should Leonard Read's 'I, Pencil' be the topic of discussion. Yes, the text describes making pencils, but it isn't about pencils.