Hello Hopey.
There are a few misunderstandings on your part. The Diocese cannot evaluate the Confession at all in a courtroom. The validity of the Sacrament isn’t in question in the court and even if it was a valid by illicit Sacrament, the Seal still applies. There is no legal way around the Seal. It’s Authority is from God. No mere legal gymnastics can alter it. An invalid Confession because of a fault or failing isn’t enough to remove the Seal. When someone enters the Confessional, everything they say and do falls under the Seal, but it is the Priest who is bound. If I go to Confession yet never Confess, say because I’m flustered and lost my composure and say “Sorry Father, I’m not ready for this,” and leave without actually confessing my sins, the Priest is still bound to forget all that just happened. He cannot approach me later and say something to the effect, “Are you ready now?” nor if he were asked by my hubby who was anxiously awaiting my good Confession so we both could receive Communion, “Did she make her confession?” the Priest cannot even acknowledge he knows what hubby is talking about. So, if a representative got up in court and explained for hours about the Sacrament, the particular Sacrament in question still cannot even be acknowledged by the Priest under any and all conditions. Questioning its validity will have no effect on this fact. An invalid Confession is still a Confession and it is under the Seal.
The fact that any penitent can speak of their confessions will not change ever. There never was a silence imposed upon the penitent, ever so your misunderstanding that what goes on in the court will change Church teaching is that, a misunderstanding. No matter what a court declares, it doesn’t alter Church teaching. The State isn’t over the Church. Individual persons are bound to follow the laws of the land, but that still has no bearing on one’s beliefs or religious practices nor can it alter Church teaching or practices either.
Hope this helps.
Glenda