It's actually more productive than not, posting in only the few boards you like and understand what's being discussed in them, some sections of the forum have sterner rules on what's posted in it than others, the mining board for example is strict in filtering the content posted there and anything not up to standard would be deleted or moved, but unlike the beginners and help section, here mods are more lenient with users, especially newbies cause this is the area of the forum were they make enquiries, it could be of low quality, but it doesn't matter all the time.

Having said that, it's basically now up to the users to choose the section they know they can communicate, and stay there, the good thing is, not posting in a particular board doesn't stop you from reading there, so you can still read posts in the section you can't really communicate in as a result of insufficient knowledge, and thus, if there's an improvement in your knowledge, you can now try out those sections of the forum.