I suspect their argument is that this is an interim solution until they get enough fibre in the ground - and to people’s houses. But meantime they can decommission bits of the copper network where there is fibre and this will save them money that they can spend on fibre where it’s needed.
It seems like a plausible argument - logical even - so no doubt it bears no relationship with the facts, even if they did claim it.
ETA I assume our BT landline will get the same ‘solution’ - especially as we have no broadband contract with them.
