not to mention that each individual fiber is passively split to as many as 16 houses
I was in Toronto when Bell started laying it's fibre optic cable into the development immediately north of the Fairview Mall, North York. Each house/property had four fibre optic feeds.
Bell Canada, and other provincial telephone companies, have benefited from municipal growth as these then-monopolies were able to able to take advantage of the road-building. When Telus 'did' Toronto, about 10 years ago, modern cable laying techniques had evolved and they simply ploughed their backbone cables along the centre lines of major city streets and put breakout boxes at street corners.
Here in VietNam the InterNet Providers run backbones down most every street with either pole-mounted or in-building DSLAMS. We have 3, or so, 5-terrabyte fibre optic cables spanning the country (north to south) which were ploughed in and terminated in buildings.
Provincial highways host high-capacity fibre cables so that even my summer house/shack, as do my neighbours in the area, over 70 kilometres from the nearest population centre, enjoy 20+ megabyte service. The DSLAMS are pole mounted.
There are two 'hot' fibres and two spares feeding every house.
VietNam, surprisingly, in it's national Civic Code has provisions for preventing any property owner from denying common carrier service/access to any occupant. It also provides that carriers SHALL share conduits, etc. within buildings. I have service from four common carriers in my Ho Chi Minh City condominium.
I always wonder why it is taking so long to fibre-up the UK.