Because the reason the law was enacted was primarily because pediatricians were routinely asking minor children, and recording those answers into databases unrelated to the medical health of specific patients, but easily available to information technology specialists, particularly those with a vested interest in supplying raw data to the feds ultimate dream project - TIA.
I can see why you might feel a need to ask, if you are prescribing medication that is mind altering and/or has a history of causing potentially severe mental depression. Or if you are dealing with a patient with mental disorders.
But Jim,ask yourself why "gun ownership in the household"would be a routine question in childhood pre-school vaccinations?
NO, and I answer "none of your business" when the pediatrician asks.
But I've posted 3 reasons to ask upthread, and if you think it's a good idea for Florida state legislators to tell me my business, they'll be into YOUR business next, if they aren't already.