Pigs are garbage disposals. Consuming their flesh is bad for you.
Pigs are actually among the cleaner animals in nature. The problem with pigs is that on factory farms, they are fed a lot of trash that is passed onto us when we eat them, and actually that their physiology is more similar to humans than other animals we eat, so there is a greater chance that bacteria, parasites, etc, that pigs have can be passed onto us compared to other animals. This is also the reason why pigs hearts are being considered the most promising option for humans who need heart transplants, and they will probably be used for that purpose relatively soon. A pig raised without all that isn't really bad for you beyond the general nutritional issues of fat, etc.