If they do not know any better, perhaps. It is not fair to compare to factory farms. They deserve to be happy, not to deal with it because someone else has it worse. I have gotten chickens from people who follow the ten square feet rule, and their chickens were definitely excited to be out, and waited at the door more anxiously to be let out than the chickens I have always let range. Once they get a taste of freedom they typically are not happy to be in. If it is literally all you have I guess it will work, but mayhaps you do not really need a bit of your yard and could give it to the chickens? Or let them range as often as possible. I just wanted to give advice in case it was not realized, that they prefer more. Just trying to help.
How much additional "bit of yard" is enough? I don't disagree with you, chickens can't have "too much" space but my ten 2.5 Y/O chickens self limit to a little over an acre (not including the ~700 sq ft of barn that is their "indoor run" and where the coop is located). They get out every day, all day and they are RIGHT at the barn door when I open it every morning. Some of that is "what have you got for us today?" begging
That said, a goodly part of any day will find them all under a lilac bush in the front or the one in the back, under the deck or the tree by the barn. There is a huge ancient maple tree in the front and a very large spruce. There is also a large spruce in the back by the deck and aforementioned lilac bush but they all hang in maybe 15 sq ft TOTAL of more "enclosed" space a lot of the time. They forage around in the morning after they leave the barn and again later in the afternoon when people who aren't home all day could let their chickens out. This is all spring/summer/fall activity. When it gets cold and windy, they just hang in the barn alley. They COULD all spread out but I still mostly see them hanging in a 10'x12' stall next to the one that was converted into their coop or various parts of the alley.
So while more than 10 sq ft of run per bird isn't a bad thing, I don't think mine would be suffering if they were limited to that a large part of the day and foraged outside in the later afternoon.