How important is a Visual

I think that in an idol scene like K-pop, it's extremely important.

Having that member that it's the visual, or stan attractor, or center (like in the AKB48 groups) and being really great at it, it can help lift a group's popularity and the public's attention and awareness of the group to a higher level and increase and bind its fanbase significantly.

There are zero elite tier groups without at least one very striking visual

Kpop is a visual industry. It helps if you have one