Flu is much more susceptible to transmission through touch. Marking is not the same when it is all over your hands, food, tissues, etc.
Last year, corona is like the flu.
This year, flu is like the corona.
Yes, to both. But they are also different.
There are many other viruses and bacteria. Mask more for some. Soap more for others. This is not new medical knowledge. Though this is about personal health. This is not really about epidemiology. Which is the field of specialty for the past year.
And, we could all be extremely careful with the flu and many will did. People walking around others when they are ill, is always inconsiderate. But during epidemics it is an entirely different problem. Like playing with fireworks instead of matches.