But voting is unlikely to help there either.
Discussion sometimes does.
As always there is probably a happy medium here. Some ideas as you state are quickly resolved, others need a discussion. Some discussions will reach a consensus, however every so often a discussion will go on and on, with more and more work being poured into intelligent posts on both sides and the production of statistics or examples to back up these posts. An idea spawns discussion that results in concensus. An idea spawns discussion that does not result in concensus hence after a certain point, one or more of the main proponents or opponents can say this has gone to far lets have a vote.