The vast majority of professional cooking shows use multiple camera setups. Nom supports multi-cam, though how it will be implemented has yet to be seen. Any multi-cam setup nevertheless necessitates a crew of people in your kitchen offering production assistance and the expenses (e.g. cameras, lighting, sound) that come with it. This essentially destroys the biggest part of what makes Twitch a thriving community: a low barrier to entry. Because the heavy visual lifting for most Twitch streamers is taken care of by whatever game they’re playing, it frees them up to put on a good show.
Those Nom chefs who don’t invest in expensive film equipment would probably be broadcasting vlogger-quality video, which is a massive problem when it comes to food. Given that smell and taste can’t translate through a screen, all we’re left with is how the food looks, and look is crucial not only for determining the appeal of a recipe but also following it accurately.
On that note, most recipes have a lot of downtime, and no one in the world wants to watch that. Rolling out fondant? 15 minutes of drudgery. Proofing dough? Have fun staring at a bowl for several hours. Is anyone going to inflict this level of boredom on their viewers? Apparently not yet, because a quick look at their site only revealed one available stream—which has since ended—and consisted entirely of one guy spending 10 minutes to make a cup of coffee.