"Bringing in money" is not the important part - it's "bringing in patients." If a surgeon attracts a patient to the hospital they can potentially also get labwork, imaging, therapy, rehab, etc, in addition to the surgery. Like the surgery robot - to my knowledge hospitals lose money on the surgery robot, every surgery is a cost center. But the patient gets a lot of other stuff too, plus their inpatient stay is shorter, so the hospital will take the trade.
I don't know who is saying pathologists are not important to hospitals. There is a lot of strange rhetoric on here. Good pathologists are very important to hospitals, and the good ones typically recognize this. Depending on how the health care law is enforced and modified, pathologists will become even more important to the hospital's bottom line, particularly pathologists who are good at helping to coordinate care and reduce testing. And labs are very important to the hospital. Well run labs with outreach services can do very well for hospitals.
Who says "radiologists are doing a lot better."? Define "better." Radiology's role is rather similar to pathology - people don't typically come to the hospital because of the radiology department, although it can be something the hospital can talk about flatteringly. If the hospital owns the imaging eqipment they will make money, just like if the hospital owns the lab they will make money off of it. I'm not sure you really have much idea about how healthcare works. And what's the deal with the attitude about pathology? At most hospitals I know of, the pathologists and the field in general are greatly respected, just like most of the other fields. I'm not sure where your attitude comes from. It is very easy, of course, to make yourself dispensable and your field seem irrelevant by leaving decisions and control to other specialties or administrators. That does happen in many places.