Much of the history of revolutionary syndicalism is not specifically anarchist. The UGT in Spain were communist syndicalists, the IWW was not actually anarcho-syndicalist, and had many non-anarchist Marxist, socialist and just plain syndicalist elements.
this is not in any way to belittle the great history and legacies of anarcho-syndicalism in some parts of the world
but i did want to put forth that there are other leftist revolutionary syndicalisms, and i definitely subscribe to it in part.