Imagine. Your macOS suddenly decudes that you don't need a web server running on your macbook, so it randomly kills it to free resources for your browser. Would you be happy with this level of care shown by the manufacturer?
It is not up to the OS to decide which apps the user needs running. Be it wifi scanner, vpn or some file sync process. All the user needs is a correct tool to know which app consumes what, and then there User must decide. Not some prick in google or xiaomi or samsung or whoever else.