I strongly condemn such irresponsible generalization. hR are involved in some of the critical business decisions like which meeting gets parle g and which meeting gets oreo.
Jokes apart... But I think hR is critical for the overall sucess of a company. They control and ensure the two most important items for the sucess of a business - Tea and water in toilets.
For most of us without the morning tea our brains don't work. That single morning tea sets the tone for the day.
For some, need to answer nature's call during office time. Imagine having to attend the call but no water/paper in the toilet. Even the most brilliant genius will falter at that point.