Two teams are developing applications using language models. Team A is using a very large, state-of-the-art model and is getting good results with simple, direct instructions. Team B is using a smaller, open-source model and is struggling to get consistent outputs. Team B's lead argues, 'The problem isn't our model; it's that we haven't found the 'perfect' universal prompt yet. A truly well-crafted prompt should work on any model.' Based on the relationship between a prompt's design and a model's underlying abilities, evaluate the soundness of Team B's argument and justify your conclusion.