This isn't feasible for a huge swathe of the USA, often because of costs/insurance but sometimes literally just accessibility/availability. A few years ago it took me nearly 8 months to find a PCP in my city that was accepting new patients (and, wee, they dropped my insurance less than a year after).

Unless you're paying for a concierge doctor, MDs frequently will not spend the time to give you useful advice. Especially for relatively minor issues.

Getting a potential answer right away is certainly temping over waiting weeks to get an appointment

While you are technically correct, we live in the real world. People are busy and/or broke. Many cannot afford to go to the doctor every time they get the sniffles or have a question. Doing some preliminary research is fine and, I’d argue, responsible.

Under non-urgent cases this sometimes takes 3-4 months in the US every time I experience the need to "ask an MD"

If the symptoms are severe enough, sure.

For better worse, even before the advent of LLMs, people were simply Googling whatever their symptoms were and finding a WebMD or MayoClinic page. Well, if they were lucky. If they weren't lucky, they would find some idiotic blog post by someone who claimed that they cured their sleep apnea by drinking cabbage juice.

soon(?) mostly a proxy for LLM