I worked in the chicken hatchery industry years ago. Males were not discarded unless they were deformed culls. All were kept and many growers preferred males as they grew faster.
At many of the farm stores chicks are for sale. often the “straight run” are males after the females have been taken out.
If you want laying chicks you chose “pullets”. If you want fertilized eggs you chose a few “straight run” to go with your “Pullets” and there will be enough males in it to fertilize the eggs. Get too many males and they will fight each other.
A straight run is males and females, not sexed. Since more females are taking out of the mix there are usually more males in a straight run.