You work in medicine?
You have a state based license for a medical profession that requires 2+ year college with courses like microbiology or trying to cram in 200 different drugs into your head (side effects, dosage, contraindications)?
You have any idea the level of control the state based laws exert over these people, in a moment by moment basis?
The state laws vary, in many ways, in how certain portions of the field operate. A person who spends a few years in 1 state can take another couple of years to achieve a "legal" level of competency. Just by moving 30 miles into another state.
You may fantasize about the level of control the feds have, and you are partially right. But it seems you have minimal experience in nursing, which in turn ends up caring for a vast majority of the old folks as they croak, which means a vast army of state inspectors coming through each year. Checking the paper work and observing for weeks. And the observers are all powerful.
Inspector: Hey you: Did you have your hand upside-down while you were holding that tablet?
Nurse: Yes sir, that is how I was trained to do it, and have been doing it for the last 20 years. It's the sanitary way, it's the (whatever, you get the point).
Inspector: It's against the rules in this state. DING!
1 DING can get a nurse fired depending on the situation. Not often, but if the management is having issues, this is the time to fire people you don't like. And when you fire nurses during a state inspection, it shows you are working on the problem, right?
0 DINGS during an inpection is suspect. It shouldn't happen. It means the inspectors are on the take. The feds get annoyed if a nursing home does too good for too many inpections.
3 DINGS and it can cost the nursing home a failed inspection. A failure means 6 months of all hell breaking lose, inspectors everywhere. A few more in the process, they close the home.
The level of detail that each state imposes is incredible. And they are different in many stupid subtle ways.