When fake research gets published, it is generally not immediately evident something is wrong. Eventually someone might notice that the purported experimental data is too ideal to be from a real experiment, or other researchers will fail to replicate the results.
The Texas doctor, on the other hand, was a practicing neurosurgeon. Other surgeons were actually witnessing his surgeries and directly observing his incompetence. He was leaving behind a trail of dead and crippled patients at an alarming rate.
I don't see how the two are even remotely comparable.
The most likely effect of the fake data on the test patients would be that their treatment was merely as effective as that of patients in the control group. It is very unlikely his methods produced worse outcomes--if they did, he would not have needed to fake anything! He could have published his methods as a way to identify drugs that would be ineffective for a particular patient, which would be about as big a breakthrough as what he was claiming.
Note that people in the test group received one of the treatments they could have received had they been in the control group. Since Potti's research was fake, there was effectively no difference between the test group and the control group.
The patients were randomly assigned to the control group or to the test group. Those in the control group were either treated with Doxorubicin/Cyclophosphamide or Docetaxel/Cyclophosphamide, randomly assigned.
Those in the test group were either treated with Doxorubicin/Cyclophosphamide or Docetaxel/Cyclophosphamide, assigned by the genomic data Potti claimed would predict which would work better for that patient.
The other factors make it much harder to prove a malpractice case in Texas than in other states, and then the low limit on the damages (which, as the article notes will leave very little for the patient after costs) makes it not worthwhile to pursue the case.
If he could have been successfully sued then after his first two or three botched surgeries his insurance rates would probably be through the roof, and the lawsuits would be public making it easier for the public to learn that they should never go to this guy for treatment.
Our institutions are in shambles, at every level.