Glam rock predated Kiss by many years; mostly by David Bowie and Marc Bolan amongst others. There's nothing that Kiss have done that marks them out as pioneers in anything, except hype over substance...
In defense, they were very good at what they did. Make generic anthem rock with just enough edge to seem rebellious and "cool". I have seen them live and they did put on a very good performance, very entertaining.
Which is good. If your music is vacuous then you'd better be a damned good showman!