Would it plummet if your neighbours did the same? Where I am its popular for whole villages to decide to lay fibre and they set up little trusts to do just tha

Would it plummet if your neighbours did the same? Where I am its popular for whole villages to decide to lay fibre and they set up little trusts to do just that and they even get grants from the government. And they have really great speeds, but at some point their bundle of fibres meets a switch.