Sure, the defense lawyer may not be personally "equipped to deconstruct whatever the "experts" spend their professional lives working on". However, the defense

Sure, the defense lawyer may not be personally "equipped to deconstruct whatever the "experts" spend their professional lives working on". However, the defense team certainly has the full capability (including budget) to find their own experts in the field to present to the jury whatever counter-arguments may exist to the plainiff's experts. If the defense fails to do so, it is either their malpractice, or the reality that they actually have no effective argument. Either way, even with your original assumption that those plaintiff experts are biases, that is ZERO reason to prevent their testimony. The only reason to prevent their testimony is that the defense has no real case, and they know it.