Your discussion was why the market was panicking on a ‘rumor’ or ‘hysteria’ about the virus.
The market is reacting to potential profit loss.
That is it.
Not just supply chain disruption.
Example: Estee Lauder sells (IIRC) about 19% of its sales in China. If nobody is going to work, nobody is allowed to shop because nobody is allowed to leave their apartments...who will be wearing or buying the cosmetics?
No one.
How many companies can just shuck off a loss of 19% of their yearly sales?
No it wasn’t.