Of course, there would be doubts.
But... that's not important.
For one, given the level of understanding and education of most people at the time, when faced with something they couldn't comprehend, you didn't even have to explain anything to them—they would concoct explanations linked to superstitions on their own because it was almost a universal system that could explain everything.
Secondly, the content of that conversation just now was so explosive that it was enough to make the people overlook "why can I hear this conversation" and focus their attention on "Mr. Fang and Miracle Doctor Xiong actually did these things."
To be honest, today's spectacle, even if it's framed and the content of the conversation completely fabricated... Mr. Fang and Miracle Doctor Xiong would likely be unable to clear their names.
