I've wondered, more than once, why it is that safety bars along with spotters cannot be employed in the bench, even for comps; after all, the person arches which means they raise the chest, so if a barbell came crashing down, the chest would sink below the safety bars anyway...less room for potential error; people use safety bars at home but still touch to chest, as far as I know.
So, why not?
Otherwise, you have a severe case of neglect where the spotters are concerned, sicne they are there for the purpose of safety and have to be relied upon; even more so a case in point, if they are chosen and employed by someone other than the lifter themselves.
Just my view; could I put so much trust in someone I did not know, especially if my life was at stake...I highly doubt it. I realise these are normally "freak", once in a blue moon, type accidents, but they do happen and it won't be the last time it does so.