Sadly in modern world,physical examination is a dying art and no. of physicians who still prefer it over sophisticated( and obscenely expensive)investigations is decreasing at an alarming rate.
That is a favorite quote frequently used by senior doctors who undoubtedly are great at diagnosing things with their physical examination skills than their current younger colleagues. Flashback to few centuries back, docs even used to taste urine of patients to see whether they had sugar in it!
Things have evolved now. A doctor cannot deny patient few basic tests just because things are absolutely normal on physical examination. Common entities like Diabetes and Thyroid take 5-15 years to develop symptoms. For example, if a doctor denies blood sugar test to a 35-40 year old patient whose parents, brothers, sisters are diabetic, just because physically he is absolutely fine, then it is over dependance on his physical examination skills. By the time he develops signs detectable on physical examination, significant damage to his organs has already taken place. This is just a single example.
Malpractice is there. There are good docs and bad docs. So best way out is to trust your instincts. Go to the doctor in whom you have faith. Thankfully there still are lots of them out there.
Most of the doctor-patient mishaps happen due to miscommunication. Some very good doctors are bad at communicating things in a simpler way and vice versa.
Lump in groin area and stomach ulcer thing doesn't really make sense. I guess its miscommunication again.
Things like Asperger's Syndrome are complex neuropsychiatric entities. They are not easy to diagnose out of the blue (even by best of the doctors) just because Shahrukh had one in the movie.
They say, Google is an unlicensed medical practitioner. You are most likely to get 90% wrong information when it comes to medical search by a non medical person. In medicine, 1+1 is not always equal to 2. There are very frequent exceptions. So it all boils down to a doctor's experience. Sometimes, it makes sense to trust the doc blindly, rather than suspecting each and everything and cross checking on the internet.
This is what I mean:
*farm9.staticflickr.com/8231/8419791784_f8ab7b631b_o.jpg
It all depends on the trust and doctor-patient relationship. If you smell something fishy, change the doctor. There are upteen options available.
Having said that, its not wrong on a part of a doctor to think of earning money. After all he has a family to look after. If others can think of profit, even doctor has a right to do so. But yes, it always makes sense to refer a case to an appropriate colleague if one is clueless about something.