I've had to sit in the room more than once waiting to see if any trials wanted to actually select a jury. There were only two times when I was in the room while the jury was selected. Once, when they filled up the jury before they asked me anything, and the other time when I was actually put on the jury.
I think it's very telling that the first time, the prosecutor kept asking if people would apply the law as written, and not how they would prefer it to be written. I didn't think I could answer that question without hearing the details, but she refused to provide them (she never got to me, so I never had to answer). It turned out that an inmate was caught with some drugs inside a prison, and she was charged with possession of the drugs, and possession of drug paraphernalia (the paraphernalia being a plastic bag the drugs had been kept in).
The second time, the judge asked if anybody had served on a jury before, and those who answered "yes" were asked if anything happened during that service that shook their confidence in the system. They were specifically cautioned to not go into details so that the rest of us wouldn't be tainted.
Both of those experiences feel like huge red flags for the system in general. But, again, I have to acknowledge there does seem to be some value in including regular citizens. I'm not sure if that value outweighs the negatives. But, it's an explicitly guaranteed Constitutional right in the US, so without an amendment, it isn't going away.
For the record, in the US, if you'd rather take your chances with just the judge, you can waive your right to a jury. But most people accused of crimes seem to believe the jury is a better bet.