[Stuart]

You forgot:

wired:
requires you to run cables to every room you want to have network access. This can be both time consuming and expensive. Especially if you wish to cable every room, and wish to hide the cables.
can also be difficult to install if you have restrictions on doing stuff to the house (e.g it's Rented or Listed).

Also, how secure wireless is depends on where you live and who your neighbours are. If you live in a road where you have no cars around, and your nearest neighbours are either trustworthy or beyond the range, you could even run with no encryption and be secure.

It's swings and roundabouts. Both wired and wireless have pros and cons.