Perhaps, but having almost all main characters have some form of internal conflict. Even if their throughline is located in Activities or Situation, they’ll still have some internal struggle. That said, the fact that selecting be-er in Dramatica automatically forces the MC throughline into either Fixed Attitude or Manipulation does seem to infer an internal struggle taking precedence over an external one.
I think the closest I’m coming to reconciling the notions around be-er characters is to think of being inclined to first try adapting versus changing the environment or situation.