In the end, it is the jury's decision. And you have to trust the system to work. However, one of the defining characteristics of FR is the intense distrust of the system. Thus, any argument you or I may make will fall on deaf ears.
Fact is, evidence is excluded for a reason. If the Defense had legal authority to put evidence in, then they would have presented it to the court. If they did so, it was rejected. Get over it.