We're talking about models used by novice people to learn and understand Git, not about theoretical equivalency of mathematical graph transformations - the latt

We're talking about models used by novice people to learn and understand Git, not about theoretical equivalency of mathematical graph transformations - the latter is a truism and doesn't bring much to the table, while the former will obviously be more or less flawed for a while until you become more experienced and fill in the gaps. People who may even have no familiarity with graph theory don't gain anything from thinking about commits as diffs in Git. The whole thread started with a notion of "particle-wave duality", which is technically true, but useless in practice when "diff between two arbitrary commits" is one of the simplest operations to think about in terms of graphs of snapshots.