If you didn't understand that question then maybe you are over complicating your internet needs.
Not everyone works in IT or even knows what the term ‘infrastructure’ means in terms of networking.
To the OP, “wired infrastructure” is Ethernet cabling, appropriate sockets and connectors and network switches to link everything together.
For example, in my friends home, when he had a large extension built, he had space left to run network cable (he used Category 6) from the loft down to each room, in the living room he ran 6 cables, and in almost every other room 2 cables. At the room end, he fitted a wall box (think power socket) with a face plate that makes an RJ45 socket. At the loft end he fitted a 24 port ethernet network switch, that each of the cables plugs into.
His internet is over Openreach wires (FTTC); so with an adaptor, he plugged the output of the splitter in the master box into one of the runs to the loft, then plugged the other end into the ISP provided router. Then one of the ethernet ports from the ISP router into the 24 port network switch.
He now has ‘physical infrastructure’ that he can plug TVs, game systems and other fixed devices into without worrying about WiFi.
To make WiFi work he bought ‘access points’ which he placed in strategic places around the home, and they connect to the ethernet wiring, so he didn’t need a mesh. He bought access points from Edimax which link to each other, so they manage the devices moving around the home.
Generally a lot of hassle (domestic, and physical) unless you are doing an extension at the same time! Most people don’t want to chisel walls etc!
23 years of broadband connectivity since 1999 trial - Live BQM