Read cross examination of experts witnesses.
Your awyer should be able to catch the expert in his own words.
bilateral varicocele is also a type of varicocele. The erection causes extra flow of blood in testicle veins varicocele. and that causes severe pain and it also hampers to sustain stiffness
rather a person prefers to withdraw from 'action' not being able to sustain that pain. Wife may claim she remains unsatified in such a scenario unless husband gets it cured.
So it not exactly a direct 'symptom of impotence' but side effect of bilateral varicocele may result as 'non able to perform' due to pain.
If a person suffers an injury over there due to some accident, let's says (playing cricket without wearing a guard!! e.g.) , and not able to perform, will it be called impotency? NO ................ it is a result of injury and it may be called as 'incidental termination of potency' by some injury or side effect of medicine.
Ask wife to settle the matter out of court.