No need to apologize - better safe than sorry.
I'm often amazed at what some doctors prescribe for patients knowing full-well what else those same patients are taking that carries interaction warnings. Those warnings are definitely there for liability, but I think more for Pharma's liability than doctors'.
I think they likely base those kinds of things on what they know about a patient and their history, lifestyle, etc.
Anytime I've questioned that (or side effects), I usually get a shrug or "If there's a problem, stop taking it and call me." I even had one doc jokingly tell me, "That's what 911 is for," (but he probably wouldn't have made that joke with a different patient). Pharmacists, IME, seem to be more concerned with interactions than doctors. It may be an educational thing, or it may be that warning patients about such things is more in the pharmacist's purview than the physicians. Again...
Bottom line, we all have a responsibility to read labels & inserts, ask questions, and make our own choices and decisions.
Doc