Think beyond yourself and your immediate needs. How about the traveler who would like to be able to go and not lug along the brick? How about a mat in the airplane tray table? How about mats on the train or bus? How about mats at the airport instead of huddling up with others around sockets and sitting on the floor? How about mats at restaurants where you can grab a charge while you are eating lunch? Office desks? Conference tables? Student desks? Seminar tables? And on and on.
There's lots of places your phone rests where plugging in Lightning to charge is not possible, easy or readily available. Now imagine charging pads in such places. Once Apple goes with a standard (or their own (non)standard) such pads will pop up in lots of places where they cannot already be found. And as they propagate, one might gain the confidence to be able to leave the brick at home.
Besides, it doesn't really matter if one sees this as pointless or not right now. If Apple implements it, some of the same people will be back gushing about the greatness of it and why it is must have, "how did we ever get by with wired charging?" Right now, opinions can vary widely because rumors are early and nobody knows if Apple is really going to do it. Once the collective believes Apple is going to implement it, a wave of enthusiasm for it will rise up and swamp anyone who still see it as pointless.