Is reducing beta waves actually a good thing? It might allow for focus and relaxation, but I wonder if that might do something like clear your working memory and make you less able to make connections between things. Could anyone that has a good grasp on this comment on whether this might be true?
Perhaps (and again speculating) it allows currently active pathways to cool down, allowing different ones to activate. This is especially useful if you're trying to solve a difficult problem and seem to be going in circles along the same line of thought. Your inability to break out of the line of thought might at times be more neurological than cognitive.