I am not a lawyer and I don't know how federal court works so I'm genuinely curious:

FBI forensic "scientists" are essentially always lying on the stand -- not out of malice or intentionally, but because their techniques do not have nearly enough accuracy to honestly present the results that they present. There is plenty of evidence for this, this article and others. Anything except DNA is essentially a fortune teller reading a palm.

So why does every single defense attorney in the nation (including public defenders) not spend hours on this particular fact any time an FBI forensic scientist testifies in a case? And essentially make having forensic evidence from FBI crime labs a huge liability and unusable in court?

Do they try and people just believe the FBI anyway?