I think most players which start playing zero-k and want to learn the basics of the game wont look in the Help -> Tutorials section. I would never expect to find tutorial missions there, or maybe only some wiki links with tons of text (which there are but people still dont find the wiki/want to use it, its really useful!).
Shouldnt the tutorials be placed into the Singleplayer & Coop section? Most people who want to try out the game will go there and see there are tutorials they can click on if they need them.