Not to put too fine a point on it, but do you consider handwriting comparisons "reliable and definitive"?
Because juries regularly convict people in courts based on such evidence.
Maybe a better question is, what is the level of "reliable and definitive" that evidence would need to reach for you to believe it should be admissible in court?
I suspect that maybe that's the misunderstanding. The level for you is much higher than maybe it is in the justice system. Which is fine. But that doesn't change the justice system. In court, the currently accepted levels are still enough.
People will be free to try to refute the attributions during the proceedings if they think it will do any good. I mean the adversarial system is also part of the justice system.
