Liquidsky: I work in the allied healthcare field and agree with you about having a strong suspicion of dx based on hx alone, although I recall reading an article which suggested asking about hx last, so as not to have tunnel vision in coming up with a working dx.
In the ER, a focused exam makes the most sense, as you're not assessing overall health.
One doctor, who was writing about modesty and medical care, specifically with the sports physical, pointed out the literature really doesn't point to a need for a hernia exam for guys. They rarely have hernias and if they have a hernia, nothing is done about it if they're asymptomatic and there's no need to restrict their activity.
On the other hand, in terms of an annual physical, I think it's important to be thorough, even if it rarely reveals a pathology. I suppose I feel strongly about this because my Dad went to a physician who was very thorough. He discovered swollen lymph glands during an annual physical. They caught the Hodgkin's Disease early. I can't imagine how far it would have had to spread before he became symptomatic.
I also agree with you about the value of lab tests and imaging studies, but again, there's a downside. A person was in the ER for abd. pn. and the doctor sent him for an MRI. Legally he's better protected than with a physical exam of the belly, but as a nurse pointed out, doctors aren't developing clinical skills as a result of reliance on tests. I suppose there's a trade-off there. Of course the imaging studies are the second largest cause of increasing health insurance rates. Then again, they may reduce malpractice insurance rates.