The article is in French, so not that easy to understand by everyone, but some group, called "Union des Photographers Professionnels" are opposing the Wiki Loves Monuments photography contest. Why such a stupid thing? Below is a translation of the relevant paragraphs by strainu:
Newsflash! That is the point, Freedom is about empowering people and changing the system, it obsoletes some structures and creates some others instead. We are not any more in the old world, when a photographer, of an artist in general, was like a god, now people have tools and access to distribution channels and participate directly in the creation of the culture, without money barriers and monopolies. I am glad to pe part of this.
"Presented as a philanthropic operation, this initiative looks more like a commercial action. Indeed, the participation is conditioned by the acceptance of a CC license allowing the commercial reuse of the pictures.
Private or public entities can therefore use this pictures legally as postcards, posters, books or as illustrations in the press.
The professional photographers living from the copyrights are worried by this initiative [...]"