yes, its very sad - you look at the SPH now and think that is an obvious issue, but its clear it wasn't obvious for years for hundreds of users. Easy in hindsight.
similarly with the shackle, its obvious when you look at the design that it shouldn't be tight enough to pinch, and actually it seems clear that this was kind of known for over 20 years, but sadly on this occasion it was also missed. The tech pubs should clearly have spelt it out, but given the consequences, it is unfortunate that the risk of pinching was not designed out in the first place. Easy in hindsight.