I pay 40€ a month for a gigabit connection to my flat in 18th-19th century built neighbourhood. 25€ for unlimited 400 Mbit/s to my phone. Actual speeds match what is promised.
You pay that much to get guaranteed throughout and bandwidth at the max whenever. Guaranteed with an SLA.
Your residential broadband is contented, you share a pipe with multiple households.
Like with GPON passive optical, your connection to the exchange point may be shared with 32 homes and is a 2.5 Gbps downstream and 1.25 Gbps link.