macOS now adds special permissions to standard folders including your Home folder, and its special folders inside it. This explains those ACLs and how to fix them.
Unix
Far from encouraging invention and technological progress, patents are increasingly the combat theatre of specialist intellectual property lawyers, the stock-in-trade of corporations that neither invent nor innovate.
Few computer products thrive for over 30 years: the Mac (31 years young), Unix in its many guises (46), and TeX (37) each spring to mind.
The Eclectic Light Company 