‘No amount of release checking will avoid a wrongly hooked on rope.
Standard reply is: "My release was checked yesterday" .’

It can do. If the ring is wrongly inserted, then all three checks are likely to expose it, which ever us done first: free drop, back release, and under tension.

These will also catch other things that may not have applied “yesterday” – different (and now wrong) ring, or damaged ring, or damage to part of the release or the cable mechanism that still allows hook up to some extent but precludes release when needed. There have been examples of all these over the years, hence the development of the three checks. Not doing them is volunteering to have some holes in the Swiss cheese.

Chris N.