There is a lot of confirmation bias in this observation. Frankly, the dead have no voices and the missing value and / or damage is often simply unobserved by those who are left.

It's rare that the damage is surfaced. I did see an event once though when a fairly senior manager made repeated attempts to hand over some data collection and reporting when they were made redundant but were rebuffed by colleagues and their manager alike. Essentially this person was seen as a bit of a third wheel, and many comments were hurled around during the lay off process along the lines of "not clear what his real contribution is".

Well, it turned out that the data that he was collecting, analysising and reporting on was fundamental to the running of a strategic investment. Some months after he left the said project tanked, and because the data was not available a lot of money that potentially should have been recoverable wasn't.

So, it cuts both ways.