That is not the reality we're living in. Doctors barely give you 5 minutes even if you get an appointment days or weeks in advance. There is just nobody to ask. The alternatives today are
1) Don't ask, rely on yourself, definitely worse than asking a doctor
2) Ask an LLM, which gets you 80-90% of the way there.
3) Google it and spend hours sifting through sponsored posts and scams, often worse than relying on yourself.
The hallucinations that happen are massively outweighed by the benefits people get by asking them. Perfect is the enemy of good enough, and LLMs are good enough.
Much more important also is that LLMs don't try to scam you, don't try to fool you, don't look out for their own interests. Their mistakes are not intentional. They're fiduciaries in the best sense, just like doctors are, probably even more so.