I don’t quite get your question, but It’s not bullshit, I believe that the terms were first coined by Marx (if memory serves). The base superstucture model is just a model by which to view the world, in that it explains (to some degree) how sociocultural/economic and other phenomenon arise from the means and relations of production, which is definitely true to some extent. But no model is perfect and it’s not the only model. The world is pretty complex and people can and do take actions that defy this model.