> My employer is known to pay for jury duty, so I always get picked.

Wouldn't that unduly bias the jury selection? In effect the employer is being allowed to buy extra representation.

Yes, but so does everything else around jury selection.

I imagine it being the side that isn't confident in its technical position that doesn't like technical people on juries.

Usually, there's a limited number each side can dismiss without cause. To dismiss more than that, they have to convince the judge that the juror will not honestly decide the case according to the evidence and the law.

It’s more that they don’t want specialized knowledge spoiling the deliberation.

If I’m an expert in cellular towers, you don’t want me contradicting the expert on cellular towers testimony on the basis of the magic knowledge that I claim to have.