To Hardwire a system back to a main control panel can be quite disruptive if the house isn't under going renovation at the time but not impossible with some vast experience of routing cables cleverly, and these systems are the most robust.
However the alternatives have improved in quality and reliability, which create less disruption to your property. They our often more favourable where the lighting design of one room is being considered, requiring one to establish the permanent incoming lighting feed to the ceiling and from this point routing cable for each zone of lighting where a radio frequency remote control dimmer will be located in the ceiling. Then from each of these each light on that particular zone will be wired in series. No other cable is required to be routed to switches as it is all done through wifi to battery operated wall stations and tablet devices, so the walls aren't touched.