Yes, it is. The hardest part is physically connection across long distances. You can peer with other ISPs though so you can still get partial, regional autonomy.

It's not necessarily easy nor cheap but it is within their own possibility. You would start with a wireless ISP, you get ISP grade unlicensed bandwidth equipment to connect your customers back to a home office with an ixp link, and then you grow from there. Supporting publicly owned fiber optics trenches with plenty of space would make it easier for smaller companies to install wired infrastructure that serves homes and businesses but that's a generational infrastructure project.