There has not been any scene in the Walking Dead to date that is as pointless, tired, and forced as the consistent show bashing on this thread. Y'all are worse than Rosita.
King was most likely convinced when Ben was killed, he just wasn't ready to start the war yet. Hell, he even said to Carol at the end that they needed to fight 'but not today'. Remember, he's not a seasoned leader, just the guy who had a tiger and wanted to pretend and found people willing to pretend with him. They just kept on pretending once they realized it gave them enough structure to build a safe home base.
The complaints of imperfect armor/clothing is funny. So the best solution is to wear something that would cause you to lose hydration faster than you can replenish it? I don't think I'd be the only one stepping over the leather and duct taped corpses because I'm ready to just stay alert and defend myself from walkers that I can hear and see coming way in advance. At least when y'all died of dehydration, you'll be kind enough to give me great targets for head shots or be zombies behind helmets and face screens so you can't bite anyone else.
(The CGwhy deer last episode is giving y'all a run for your money though.). :-)