That's a great criticism. By allowing the viewer to focus on each small step, these arguments can be checked step-by-step more rigorously. However, by encouraging this small-scale focus, you leave yourself open to inconsistencies that can only be seen at a larger scope.
In reply to: Community Epistemic Practice
There are software tools, possibly helpful for community truth-seeking. For example, truthmapping.com is described very well here. Also, debategraph.org, and I'm sure there are others.