This is a dangerous false analogy. He wasn't in the pub with his mates, he was at work, in a situation where he was well-aware he was being recorded.
It's the equivalent of attending a Zoom meeting, hitting the "accept" button that comes up that says "this Zoom is being recorded, hit accept to acknowledge and consent to be recorded", then saying something in the Zoom meeting because because all the other participants except your friend have their cameras off, so you assume they're away from their desks, and you also assume no one will ever watch the full Zoom recording, then being astonished to be held accountable.
going against the grain but there's something truly sinister about sound engineers (or whoever it was) leaking private conversations. Of course you're going to say off the cuff things during an entire day- you're not going to be fully on your guard- and you shouldn't have to be. Imagine someone told you they'd recorded everything you'd said today and intended to publicise it? I know I wouldn't be feeling very relaxed.
I really don't understand why people indulge in such ludicrous hyperbole. Do you really think celebrities are miked up 24/7?? They are miked for the short period of time they are actively at work - literally no difference from people whose office jobs require them to be signed into Zoom or Teams while at their desks (except that DW is being paid millions). Most people can restrain themselves from saying stupid shit until they've switched Zoom off.
So for your "truly sinister" post to be accurate, it would need to be worded like this: "Imagine if someone told you they'd recorded everything you'd said while you were at work and actively logged into Zoom, and you'd had private conversations while sitting in the office logged into Zoom."
If you want to have a private conversation, just log out of Zoom, or better yet wait until you're outside the office, it's not exactly rocket science to know to watch your tongue while physically inside your workplace, in a situation where you're completely aware that you are being recorded!