Mandated build-outs worked in the past for electrification and the telephone. Is there a reason why it wouldn't work now for optical fibre? Fibre lasts a long

Mandated build-outs worked in the past for electrification and the telephone. Is there a reason why it wouldn't work now for optical fibre? Fibre lasts a long time, so its installation cost can be amortized over decade(s) like the previously mentioned cables were.