People create their own threads for such things. Mainly because they like to have their OWN thread so that they can put their OWN stuff in said thread. They also like to have their own thread so that people may critique their art.
Imagine how sloppy this thread would be if it was actually allowed. You'd have people submitting many things and most of those things wouldn't even get critiqued.
Also, yeah. This whole forum is for that, so that they can make their own thread so that they can submit their art.
