Earlier quoted context omitted.
A company as big as LinkedIn should have bots continually accessing their site with unique generated passwords etc., and then be searching for those secrets in logging pipelines, bytes on disk, etc. to see where they get leaked. I know much smaller companies that do this. Yes, it's easy to fuck up. But a responsible company implements mitigations. And LinkedIn can absolutely afford to do much more.
I always picture a random middle manager in $large_organisation being told about something like this, and then they work out the angles and try to find the benefit. If the method works, and it shows that the logging feature Fred got so much credit for is storing passwords, what are the political implications of that? Can our intrepid middle manager steal some of Fred's glory? Or is Fred an ally and it should be caref…
Are their psychopaths and Machiavellian schemers in management? Certainly. Are they the majority? Almost certainly not, unless you're working for absolutely the wrong company.
As the Brits would say, "cock-up before conspiracy."