It wasn’t mocking it was a genuine point delivered not as polite as could be (there is a difference). You said hierarchy is inherently oppressive I countered pointing out it seems silly to call the hierarchy between parent and child oppressive or between safety staff and other staff at dangerous industrial locations or between doctors and nurses. If these examples are not oppressive and in many cases actually positive it then brings into dispute the idea of oppression as some inherint or intrinsic aspect of hierarchy as opposed hierarchy simply being a useful social construct that can be used in many ways depending on outside factors such as class content etc.