they said once there was no collision the other party would never win.
whomever you spoke to in insurance company are wrong - if by your actions you caused the other party to crash (into someone else/wall/whatever) you are liable. I've been through this twice with two motorbike crashes - I crashed both times after taking avoidance action to avoid impact - insurance companies will rule on whether you caused the crash depending on all factors involved (red lights/lane positioning/state of road etc.)
In both of my crashes - first guy jumped onto roundabout and didn't see me already on it and other did illegal right turn across double continuous white lines.