What, boiling water? The Chinese have been drinking tea for thousands of years.
It was after a particular outbreak (cholera?) somewhere in the 19th century that hit northern China way worse than southern China that they figured out the major difference was the hot water habits in the South. Even in the 1930s there was still a push to increase boiled water usage.
Sometimes conversations can have practical applications. Other times they’re just academic for academics sake. But both are perfectly fine conversations to have.