That's a nice sentiment... And I agree.
But I think the main point has to do with networking fundamentals. Wireless is a virtual shared media. All clients on a node share the same amount of bandwidth. 54Mb can start looking pretty slow with ten busy clients.
Modern switched wired networks segregate traffic between nodes, rather than working as a broadcast type network (wireless/thinnet). So you have a massive performance advantage by using wired networks. A quality 24 port 100Mb switch has an theoretical aggregate capacity of 4800Mb assuming all ports are used to capacity in full-duplex mode (And the backplane can handle it), 2400Mb in half duplex mode, where as a 54Mb wireless network only has 54Mb which is split up between every node on the network. The math is a no brainer. Even with real world non theoretical numbers, the performance difference is staggering.
Wired is the only way to go in a production environment with *supplemental* wireless access for roaming and mobile users.
One of the other advantages of cat5/e is it's use of inductive reactance to mitigate EM interference. The gauged twist in the pairs increases signal quality, but also mitigates the collapse of EM fields (mostly from local lightning strikes) and the unbridled voltage they create (which is directed right into your network electronics and connected nodes). Proper grounding aside- it doesn't help if the voltage is already in the circuitry.
Go 100% wireless in your office, and enjoy damage from all those wireless antennas picking up current from a collapsing EM field.
Every spring, we lose a couple of laptops, one or two wireless nodes, and a wireless camera or two. It's always after a storm and it's never the wired equipment.