I’ve looked through the accident report. The pilot was experienced, but new to that glider and hadn’t practiced stalls, spins, or even tight turns on it (as used in thermalling) before coming to the contest. He spun the glider, but it recovered, maybe on its own because the canopy was jettisoned just after the glider was seen to recover. Too hasty a decision to bail. Then he actually got out quickly, around 1000 to 1100’ AGL maybe, low but with enough margin. Yet then he didn’t pull the ripcord. Not even at too low an altitude, but not at all. There were quibbles about when the rig was last packed, but nothing to suggest it wouldn’t have worked fine.
The report doesn’t look into the fit of the rig, but I’m guessing it might not have been snug and the harness shifted on his body, so the ripcord handle shifted too, and he couldn’t find it in time. A really unfortunate series of events.
The report way overdoes things suggesting that he should have been an active skydiver to be able to better handle his gear, but while that is technically true, nobody expects that of glider or aerobatic pilots. Still, some more practice with the safety equipment makes sense. As for glider pilots making a jump or two for practice, as a skydiver I’d say it helps with general comfort in getting out in a wind blast (avoiding being shocked by the sensations), but civilian student skydiving & skydiving gear is so different from a bailout & bailout rig, that there are few specific skills that would transfer over at all.