You don't find it interesting to understand the biological, medical, and functional underpinnings of what would differentiate a chronic respiratory condition with acute attacks from a simple infection? If you can't find that interesting, are you really all that more interested in the psychological components of their problems?
Knowing why someone has this or that breathing problem and how living with the condition and how the treatments affect their lives is equally psychological and medical. If you can't get yourself to focus on the simple things your medical mentors are wanting you to focus on - acute treatment of asthma attack, preventative treatments of asthma attacks, acute treatment of pneumonia, indications for hospitalization, etc - then how are you going to ever really understand the resistances the patients have to these labels / treatments? Knowing the adverse effects of these treatments is critical. Knowing why the benefits medically outweigh the risks is absolutely critical. Then you can think about why the patient disagrees with that balance (consciously or unconsciously, denial vs rationalization, etc).
You're lying to yourself if you think that you can understand the psychological from a psychiatrist's perspective without a foundational understanding of the other specialties.