I agree completely. This is not somewhere to cut your teeth on offroading. With an experienced group and an experienced driver I would still give a ballpark 50% chance of going through clean again. And major carnage could easily be the outcome. I was totally aware of the risks. Toyota caved in a door. I'm sure that it had a full team of experienced folks. And the Jeep jamboree is not a fair representation of typical conditions. If you get a crew of 100 people to stack rocks - I'm sure you can make it through easy enough. Even so - this is a more likely outcome: (keep in mind this was during the Jamboree with a full JEEP factory team for marketing trying to get through clean). Apparently this GC also experience a major rupture of one of the oil systems - either transmission or engine.
A certain element of a clean run was just luck. Luck that it was mostly sunny. Wet rocks could spell trouble. And just some luck that I didn't slip at the wrong time on many of the obstacles that are matters of inches in off camber angles. If you haven't done this type of thing before - a fun weekend can turn into a very bad experience very quickly.
To give a few examples - the SAS 4runner in our group sheered steering knuckle bolts and had to tear down the axle in camp. An LC40 in our group broke an 80 series birfield (those are much stronger than minitruck ones). A crawler with stacked cases broke an ouput shaft in the transfer case that they ended up cutting the entire low range gears out of a 2.27 output shaft with an angle grinder off to get a trail spare to work with the 4.7 gearset to get off the trail. And a rock buggy pretzeled a drive shaft and had a new length of tube brought in to fabricate a shaft on the trail. There were also numerous small things like a valve stem ripped out of a wheel in a water crossing. You had better be prepared for major repairs. If this isn't something you can do in your sleep in a shop - you don't want to learn it for the first time on the rocks. Going with a club is a great way to meet new friends and learn a lot. It also provides a safety net. In our group we had a helicopter service available along with HAM radio coms to someone with a sat phone in an emergency. If you're going out on your own - you don't have those backups in place most of the time. Nor do you have Marlin Crawler or Valley Hybrid following as a sweep to make sure everyone is safely off the trail.
Also - you need at a minimum IMO a spare front axle assembly, a u-joint, and a valve stem or two in your spare parts kit.
I had a super fun time. I might do it again next year. If I'm honest though, this is not a great trail for a stockish 5th gen. And it's a testament to Toyota that they are still building a very capable vehicle. It may be a little soft around the edges, but the 5th gen is absolutely still a legit off road platform.