Trusting a professional's recommendation is not treating them as infallible, it's called "using the advice you paid for". No I don't blindly trust my mechanic, you shouldn't blindly trust anyone but generally when you seek out a professional's opinion on something it's because you value their expertise.
> You should be double-checking absolutely every single thing a doctor is telling you
Right, because the average person who knows next to nothing on mental health is going to make a better judgement call on which medication to prescribe their child than their doctor.
Guess what, if that were the case we wouldn't have a story here.