What are "Professional hours"?

Conversation at coffee turned to cops and the court system.

One of the guys opined that less than 1% of the tickets given to out-of-town drivers were contested.  It just does not pay to miss a day of work.

Then conversation turned to comparing Walmart and the court system.  The local Walmart is open 24 hours a day and is open on weekends.  It is staffed by hourly workers making minimum wages or just a little bit more.. 

The court system has much shorter hours and is staffed by "professional" hour.  The staff is usually making significantly more than minimum wages.

At one time, "professional" meant task focus, not clock focus.  "Professional" meant doing what it took to get the job done.  Now, "professional" seems to have devolved into short hand for "banker's hours".

Police have no inhibition about issuing tickets regardless of the time-of-day.  The hourly Walmart worker who got a traffic ticket coming home from their third shift job already has their body-clock completely jacked out of shape.

Professional civil servants would be held in higher esteem if they adhered to the older definition of "professional" and if they served their communities with the flexibility shown by the workers at Walmart (and the Urgent Care facilities, and the cops on the street).  Why do courts shut down at 4:30 PM?  Why aren't they open on weekends?