Utility of Key Lock Chord Notes/Extensions

I’m working through the paid tutorial video and have a question about how others would use the Key Lock Chord Notes or Chord Extension features.

Maybe it’s meant for folks who have very little keyboard ability or theory background - I just don’t see how I would use it. By no means am I gifted piano player, but for someone who already knows how to construct triads and extended chord shapes, why would you use it?