Kemper is not for everyone. There are plenty of guys out there gigging with a 1x12 Mesa tube amp, an eq/boost pedal, and a guitar that sound fantastic and love their sound.
I still find that I come back to the sound with a band and the ease of setup outweighs all concerns with amp in the room sound; however, others have different priorities and different hot buttons. For them, KPA may not be the right answer.