I just don't think we should try to second guess this. Rick wasn't riding too fast. I can't count the times I have dropped my XR650L under similar conditions. I just got away with it. He didn't. Freak accident. Don't say that he shouldn't have been riding Bastrop. It doesn't matter where it happened, his number came up, period.
I have to agree with JT here. I started riding dirt on my klr 650 and took multiple trips to Arkansas and Big Bend and Rich's Hill Country ride in Junction. I had multiple drops and get offs in every location and never got hurt until the Hill Country ride when I had a get off in a slimy water crossing. I was going less than 5 mph, had my feet on the pegs and the bike just went down so fast in the green slime that I couldn't even react. Slammed down on my left side on my ankle which was still on the pegs and on my left shoulder. Thought for sure I had broken my ankle but after a half dozen ibuprofen, I completed the ride. Later X-rays confirmed that I had not broken any bones, but I am still having shoulder issues 2 years later. Prior to the water crossing get off on the same ride, I had a high speed gravel low side while I was trying to keep up with a couple of guys on ktm 990 adventure bikes I was definitely riding faster than my skill level there, yet I didn't hurt myself or the bike. I simply picked up the heavy pig and kept going. So now I have a 525 exc and I'm still learning to ride dirt and still falling off. Bottom line is sometimes you just go down weird and get hurt and there is not always any good reason. jmho