Time? Health?

I eat (breakfast/lunch/supper) at a table while sitting on a chair.

Most of the time, while eating, I can see a rather busy sidewalk where a lot of people are rushing by, hurrying, while eating junk food from a plastic bowl or some kind of (junk food) sandwich from a paper bag. Is this a new thing? Do they not have time to go sit at a table for lunch? Or do they just don't care?

I was taught to never walk while eating or drinking...

Or is this just part of the rat-race where people don't have a choice anymore and need to force feed themselves between two work sessions?

(Also, when did people stop cooking for themselves? Cause I see way too many pizza's being delivered.)