In my opinion... without bass... there is emptiness.

I was brought up as an accordionist.. Left hand bass was a necessity.

And when I went to organ, pedals and left hand bass was still a must.

When we started to use synths (keyboards). You had to use a keyboard for left hand bass, or you weren't doing it right

I was taught with a strong background in chord structure, and it was natural to me .. playing left hand bass.

My left hand knew where my right hand was going, and both hands listened to the drums/ drum machine.

I don.t even need to think about left hand, it is almost automatic for me.. Any key feels normal.

When I play arranger keyboard today, I usually turn off arranger and play trio type stuff (left hand bass, piano, drums.).

Sometimes I will add the auto bass, and/or guitar part of a style.

For you guys that seem to struggle with left hand bass... you are thinking too hard.. listen to what bass players are playing.. listen to your drums, and feel the bass working within your chord structure..