'Bandwagon' is only a fallacy when we're not talking about something which is contingent on human views and behaviour. What people believe about the situation is a factor in how the game theory plays out, not just in DPOS but in all extant crypto financial systems.
You are saying that the same thing can happen in any hard fork, but it's not true. The viability of such an action is dependent on how participants view it, and people would view it differently than this situation.
You don't know that.
From the Steem soft fork 0.22.2 up and including Steem hard fork 0.23.0 I have seen people on both chains defending the actions of “there” chain as justified — accepting the explanation of the witnesses without questioning.
I see no reason why this trend should change now.
Needless to say that I personally speak out against all of the above and on both chains.