They not only make decisions but force them on other people, willing or unwilling. I don't know why people will never let me use those powerful, attention-getting, provocative terms, just because they're not accurate. Well, all right. Have it your way. Anyway, the essence of my argument is that decision making is a specialty, like auto mechanics, house building, or accounting.
Good decisions are important.
Communities cannot afford very many bad decisions. Good decision making, though it includes agreement seeking, must go beyond it. It requires wisdom. If a group is lucky enough to have a member who has this wisdom and this skill, plus the trust of the community members, it is downright wasteful not to use it. Mostly, communities don't have anybody who is quite that good and that wholly trusted, so the strong central leader system of government isn't an option for most of us.