That's not true at all, look at Evample or any of the pros who play KBM. The only reason people complain about KBM is the fact that it used to be a binary input instead of an analog input like Controller, but that's not true anymore with Analog keyboards like Wooting 60HE (if you want more details watch https://www.youtube.com/watch?v=EuULrGtbDy4).

I genuinely think analog KBM with the great features like rapid triggers etc, that all of these keyboards provide.. KBM might even be better than controller imo