The defence does not come from the legal team but from the Defendant. The Defendant provides the instructions, presumably in this sad case that he did not have sexual relations with Frances; if he denied having sexual relations with her, then his case can only be that she is lying about it. How else is his case to be advanced other than to say she is lying. That applies in many cases of sexual offences as it is generally not a situation in which one would be suggesting the complainant is mistaken. If someone says something which one disputes is factually correct, and they cannot be mistaken, then the only possible explanation one can give is that the person is lying.
It is not for any Defendant, whether male or female, in any case, to provide concrete evidence that the person making the accusations is a fantasist or liar, although clearly if such evidence can be produced then that would strengthen the defence case. Are you suggesting that if the defendant cannot produce such evidence, he should not be allowed to say to the court that she is lying? The Defence should only be allowed to conduct the trial by testing the evidence by highlighting inconsistencies in the evidence, rather actually advancing any positive case?
would want real, concrete evidence to buy into the possibility that she's a fantasist or a liar, because most people aren't, so it's unlikely, so therefore it's not a reasonable proposition unless you can show other evidence that she's unable to tell truth from fact in every other area of her life.
And similarly, a court would want real concrete evidence to buy into the possibility that the Defendant is a rapist, because most people aren't, so it's unlikely, so therefore it's not a reasonable proposition unless you can show other evidence that he is a rapist.
The Defendant is treated in a similar manner to the complainant when giving evidence; the prosecution barrister will call him a liar, a predator, violent, manipulative etc? He is subject to aggressive cross examination, sarcasm etc and has not actually been convicted of an offence at that time. At that stage, the court have not even accepted that any offence has taken place.
If you restrict the ability of the Defence to rigorously test the evidence and advance their case, then you significantly increase the likelihood of Defendants, whether they be male or female, being wrongly convicted.