I agree. Defense attorneys and prosecution are with the jurors and will keep it neutral, as much as that's possible.
Making these tours at the beginning seems important, IMO, because of the complicated, extensive nature of the crimes. There were many people murdered in different locations, miles apart. There were also staging areas, the Peterson Rd Farm of the 4 Wagners and Flying W Farm, where evidence was hidden. Factor in any locations along the way for eyewitnesses, evidence found, etc. it's very complex. Add in all the details about hacking social media accounts, hacking phones, etc. If they just dove into the case in court, its easy to see how jurors could become confused. JMO
Reading some of the Tweets of the journalists, even they are getting confused by the many details.
Some even mistakenly think the prosecution believes that GW4 didn't shoot anyone. That's not true.