Execs don't interface with employees on a level where there is much emotion going on, and they probably see this as a benefit.

This is par for the course. Athletes won't ever say 'I am moving to a new team' a month before a deal is inked. Employees won't go to their manager and say 'I am thinking of leaving in about a month, not sure yet tho'...they give the 2 week notice and peace out.

This is all extremely strategic, anyone who thinks the average exec really gives a damn needs to wake up. There are certainly exceptions, I have yet to see it.