First, most jurors are not the sharpest knives out of the drawer. Especially in California.
SEcond, as former Law Enforcement, there are a lot of things that you can not do for forensics. For one thing, you never get near as much time to work a case as the TV CSI gang does
Which is why it's the job of the police to collect as much evidence as reasonably possible, and more importantly, it's the prosecutor's job to explain the the jury why the evidence is sufficient and what expectations are reasonable.
I wouldn't make generalizations. We all see the celebrated cases reported on the evening news and listen to the jurors who decide to talk to the media, but are they representative? You need to ask yourselves how the jury pools are selected. Are they from voter registration lists, tax records, driver's license lists, or what? Also, the jurors who talk to the media are going against the advice, but not official restriction, to not talk about what goes on in the jury room among the jurors.
I just finished a period of jury service including service on a jury that I would characterize as well educated, analytical, and quite methodical. The jury pool was pulled from voter registration lists which I suspect leads to a somewhat higher quality because everyone there had to at least take a little extra effort to register.
Also, the area covered by the court affects the jury pool. A high income, professional concentration of potential jurors vs a low income, slum area affects the composition of the jury pool as well. I can't comment on the widely reported techniques of shaping the jury through peremptory challenges by both sides other than to say that I didn't see the resulting jury skewed away from the general characteristics of the large pool called as potential jurors.
You don't?
Let's see . . . 1 hour show . . . less 20 minutes for commercials . . . less 2 minutes for Opening Sequence and Credits at end . . . less 1 minute for 2-30 second PSA spots . . .
That means the Police have less than 37 minutes to process a crime scene???
and dont forget if a crime tech ordered a cop around like on "CSI" he'd be laughed at.