You need Router for Wireless access, it cuts the Modem, ONT equipment. Or if you have just one computer you can directly plug your Ethernet cable to the Wall Socket. I used to live in a building where every flat had Ethernet cable were pre-wired.

If you are in a new building, without furniture and mess, fibre of course make sense. If you live in a Small Apartment, old making installation difficult, Fibre isn't so great. My guess is that the problem may be specific to cities.