Over time, supervisors often become resistant to new ways or perspectives. It isn’t that they don’t want to consider a new perspective, and quite honestly, it might be ‘if it works, leave it alone’.
Although that theory has merit, it can also be viewed as knowing their jobs, discounting change, digging their heels in, and continuing to use habits or processes based on their own beliefs of correctness in leadership thinking and doing. The more experience they gain, the more they use what has worked (maybe not perfectly) but it works.
The landscape is changing. Every supervisor needs to have current knowledge of legislation together with refreshing themselves in methods to motivate and engage others.