Imagine a meeting with a psychologist who gives a blatantly illegal reason for keeping my spouse detained under secrion of the mental health act.

Without a recording my options are to write a nearest relative's letter of order to discharge, and face the wrarh of the psychologist who could then cause considerable trouble for me and my spouse.

With the recording all the backlash from the psych is damped down when I let people know what actually happened.

Recording that meeting has some ethical and moral problems and the other people in the meeting would be strongly against me recording it. And while there might be laws against it they tend not to be strictly enforced over here.

There are a bunch of other "he said she said" situations where a recording might be useful.