And many apparently don’t.
My point I was trying to make (poorly) was that perception of the proof distorts the result.
Some people believe they need a burning bush before they believe God is speaking to them.
Some hear and see God every day.
But I can assure you, it is very tough to hear God while you hold your fingers in your ears and shouting “not listening, not listening...”
Most people first have to be willing to seek God before they find Him.