Randomly came across this Velcro saddle contraption - super dangerous or actually useful?

Lifelong English rider and recently saw this ad - at first I was horrified - seems so unsafe to be stuck to your horse in an emergency? But then I thought maybe it would keep you on during a spook and avoid a fall? I’m not going to buy it or use but was curious if any of you have or if we think it is safer or more dangerous…