The problem is direct democracy is everyone needs to show up at the same time. It is impossible to do this for any modern community of more than 100 people and even going that large is only possible if you limit who has a vote to [white adult males] or some such subgroup that allows someone else (women and children in this example) to take care of everything else that can't be ignored while in the meeting. Once you get larger than that someone has a conflict and they won't be able to show up, and now they have no input.