The people move on.
They learn that this is “how it is” and that nothing will ever change.
They realize that their leadership would rather trade paper and theory for the people that are standing right in front of them.
As it crystalizes in their minds they now start to understand the adage of “you don’t leave a company, you leave the team/leader you are on”.
And when they leave, those responsible for the wonder how it could have ever happened when they have such a great process in place.
Cue the hiring machine to start ramping up to fill in the missing blanks.