People have all these theories about roll and weight transfer etc which may or may not be correct, but the simple fact is, less rubber on the road less grip at that end. This happens when the inside wheel suspension arm hits the stop.

An exagerated example is a motorcyclist doing a stoppie. The rear droop setting had no effect on the front end.

Another example is a top fuel dragster lifting a wheel under acceleration. The front droop setting had no effect on rear traction.