What, if anything, is wrong with following convention?

Again, leaving this pretty open…Is there anything wrong with following norms, which norms are okay to not follow, etc? Is it wrong to only care about oneself and one’s family w/o thinking about other people/communities/nations? Is not caring about communities part of convention or just the opposite? Is not wanting to ‘start trouble’/‘stir the pot’/‘ruffle feathers’ a good quality or a bad quality? Are there mitigating factors (wanting success, wanting to lose the battle but win the war, keeping your kids safe, etc.) that affect whether you will follow convention? Do you follow conventions? Is ‘because that is the norm in our society’ a good explanation to any behavior when you’re raising children?