Because you have "incompetent" management that's why. I took over a job where the gal told the boss she needs 2 full weeks to do the slides that contains monthly data to be presented by the director to the VP - during their monthly calls.
I took over the job and automated the process - it took me a while...but it is now a mere "10 min" to get it done.
Case in point, you have employees like this "former" person who inflate their value. She left to go to Expedia. And you have workers on the other hand that worked for the greater good of efficiency and effectiveness.
What did I get for it? Nothing. Because manager didn't know Excel. We got into a fight over my review and was told by the director to "leave" the group. Well, I did...and the director last I checked was probably fired - but managed to get his buddy to give him a 2nd line independent contributor role. And as for my former manager? I don't know what happened. As I have left the company as well, about 3 years after that incident of unfairness and horrible treatment.
If I didn't have a direct line to the upper echelon of the company to know about what was said to me and such...truth would never have been revealed. But there's not enough oversight as they too (the upper echelon...and I don't mean your VP, AVP, or SVP)...but the highest tier (no name shall be named)...they tried...they do/did.
But as you all know...ATT's middle management is the gloated belly that sank the ship.