I'm not sure how this applies to a homestead that historically never had a road across it.
The Unlawful Inclosures Act applies to homesteads because all laws are incorporated in the application for homestead, and grant of homestead.
The homesteader agreed in the application, to follow all laws.
The Unlawful Inclosures Act gives unrestricted right of passage across private land for access to public land.
It does not allow a road to be constructed, but must allow passage "for any and all lawful purposes".
The homesteader never had the right to deny passage. All subsequent owners take the homestead as it was granted and have the same restrictions.
The Federal Government isn't telling you anything that was not agreed to before it became private property.