Probably because the commenter is not a medical professional and isn't qualified to judge the veracity of anything they find. "Do your own research" is a fucking plague on our modern world and is why the internet is like wall to wall grifters now.

By all means, Google whatever you like, but if you show up to a doctors office waving WebMD sheets in a medical professionals face, you are going to be mocked and you deserve it.

I witnessed a pair of doctors prescribe a family member an incredibly dangerous drug for an off label use. The company had been fined $500 million dollars for various illegal schemes to convince doctors to write such prescriptions, but I’m sure the doctors in question were unaware of this. When this family member began to exhibit textbook symptoms of an extremely dangerous (life threatening) condition which could only be caused by the drug in question, the doctors failed to notice, and in fact repeatedly increased the dosage, and added more drugs on top to treat the symptoms caused by the initial drug. It was not until I accompanied my relative to a doctor’s appointment and delivered a carefully designed incantation that they made the correct diagnosis and halted the prescriptions.

So should I not have done my own research?

I both agree and disagree. The issue is not independent thinking and research - it’s the low media literacy of the average person that makes them vulnerable to frauds, grifters, and crazies.

With that said, the first few search results for the query were from the journal Nature, the NIH, and Harvard university. Hardly the loony or malicious caricature that you attempt to paint.