It's not really needed with LE as most (all but one) of our images boot directly into Kodi where the first-run wizard guides you through connecting to a network. All you'd do is replace one typing opportunity (password) with something earlier in the boot process where you'd need to input two things (password and SSID) and from experience it's better to reduce the opportunities for user input; too many fat fingers on keyboards
Problem is input. I use kodi remote by example on my rpi. With no wifi, I must use hardware, mouse or keyboard, to get my wifi working. Better to get fat fingers on my Iphone with kodi remote, then to plug in a keyboard etc...
