You ask a very valid question! Perhaps it is partly on principle. I would prefer to say "thanks but no thanks" to anything that is optional. It is annoying when any company makes you do something that you do not want to do to complete a setup. Apple does this all the time, and it is annoying. And yes, I know that many people use and love web clipper, just like many people love "siri" and "location services" -- awesome! But I would like a simple option to dismiss a panel, permanently, that does not require me to install or uninstall anything. This is why I asked "without installing Web Clipper?"
I appreciate your response, and ultimately, I will probably follow the instructions. I was just hoping for another answer.