Clarion, whether you like them or not, such statements appear to be here to stay. They are not just "fanciful" but allow victims a most important opportunity within our legal system. They can also be considered by any parole board - not that they can apply in Letby's case.
https://www.gov.uk/government/publications/victim-personal-statement
I think it would take a particular kind of foolhardy person to say that they would have already made up their mind how to vote without listening to and viewing nearly 10 months' worth of evidence. If you are serious about the content of your post I sincerely hope you are beyond the age for acting as a juror. I viewed the judge's summing up when it was reported in one of the papers on a daily basis, surprised I was able so to do. Such reporting gave me an opportunity to try and comprehend the length of the trial, given it has become our lengthiest murder trial of modern times.
I believe the defending counsel still has the opportunity to challenge members of the jury in our courts so the make-up of male to female jurors is irrelevant in your post.