The jury selection process is not unlimited. ... They get six dismissals each for no reason but after that if they want to dismiss a juror they have to explain the reason to the judge so it should even out for both sides.
Jurors take an oath to decide a case
solely on the basis of the evidence presented in court.
Do you have any sort of domain knowledge beyond a layman that's relevant to the evidence? That literally means you can - and should be - dismissed for cause.
Of course, the end result is that we get decisions that fly in the face of logic... because
we don't see the evidence
tabla rasa.