We are not Hasidic Jews. We do not have to go to heroic lengths to organize our whole lives, schedules, and calendars to accommodate doing no physical labor, cooking, or commerce on the Lord’s Day.
Life is complicated — I have been warned more than once on these forums against seeing things “in black and white” (an admonition that I will consider to a greater or lesser extent, depending upon the subject) — and we are not required to hijack our entire lives on Sundays under the rubric of “keeping the Sabbath holy”. As a general rule, I err towards liberty when it comes to doing work or engaging in commerce on Sundays. We do not live in a medieval European Catholic farming village. I am perfectly OK with places such as Chick-fil-a and Hobby Lobby closing on Sundays — many private businesses in my part of the country do likewise. But there are certain things that have to be done, and certain other things that, no, they do not strictly “have to be done”, but it is inconvenient and irritating to have to refrain from them, they are not major acts of work or commerce, and places of business will continue to be open whether I patronize them or not. And there are some people whose lives require so much of them that, for all practical purposes, Sunday is the only day they have to do certain things.
For instance, I do not run out at 10 pm on Saturday night to put a tank of gas in the car, if I suddenly recall “oh, no, I need gas to get to Mass tomorrow”, and I do not avoid getting a quick fast-food meal through the drive-through on Sunday saying “this would be unnecessary commerce, I’ll just wait till I get home to eat something”. That sort of thing. (And Waffle House will continue to be open until about 5 minutes after the Second Coming.)