That's a good question - I think the downside I was trying to describe has to do with not seeing the need for vision in addition to or in partnership with getting our hands dirty. Conversely, we often see church communities talk themselves in circles (much to my frustration) without getting the rubber to meet the road. They are necessarily complementary attributes.
Like all wisdom, I s'pose, it mainly comes down to balance and having enough peripheral vision to not get stuck in any one paradigm.