Indeed. But they add up. One of my 4 year old Swedish Flowers laid 126 eggs this year, and there are a variety of other people's experiences here https://www.quora.com/How-many-eggs-will-a-free-range-chicken-produce-in-each-year-of-its-life
So, if you live on a subsistence level, is 90# of feed worth 126 eggs per year to you, and fewer still next year, and the year following? Or are you better off investing the feed into raising a replacement bird to maturity which is likely to produce 180+ eggs in its first year, perhaps 150+ its second, 130+ its third - and thus net a bonus of at least 90+ eggs over the coming years for the same feed investment?
Even 126 eggs a year is near the average of that 1919 competition of top layers - and those were NOT old birds.