Or they don’t believe that the retest has significant value to the patient.
Which may be true. Unless you plan on doing preemptive mastectomy or something similarly major, the things you could/would do in response to a positive result are pretty much all things you should be doing anyway, especially given the family history.
This is why you want someone in the loop who can help you interpret how much the results should actually affect your lifestyle and plans.
My feeling is that if you’re going to pay even a small amount for the test, you can probably afford a comparably small amount for help interpreting it. Yes, it should be cheap. It should also be accurate, and correctly interpreted.
If the cheap testing came with a clear statement that “THIS IS ONLY AN INITIAL SCREENING, DO NOT TAKE IT TOO SERIOUSLY BECAUSE IT MAY BE WRONG IN EITHER DIRECTION”, I would agree that it didn’t need to be regulated. When they start claiming medical benefit, they’ve crossed the line and have to demonstrate that it is accurate enough to have that benefit. Truth-in-advertising laws, if nothing else.
Cheap and misleading is not an improvement over expensive and reliable.
