This has been my standard reply to the "It's just a flu" concept for some time now.
Aside from all this, it's incredible how difficult it is for people to think about this using all the info available (long onset of symptoms, asymptomatic spread, high % of hospitalizations / intensive care, etc) plus thinking in the long term.
I know the generalized idea is no face masks if you don't have symptoms, but if we all used them it might have a good effect on curving the spread.
Unfortunately, western cultures associate face mask with sickness, and are frowned upon.