What happens when the bumper protector gets scratched? Will you be looking for a protector for the bumper protector? .
Another option to consider is a boot liner with a fold out flap that covers the bumper while loading / unloading. Alternatively, the cheap / no cost option is to carry an old towel or similar (e.g. a car travel rug) to lay over the bumper when loading / unloading.
I also struggle with the concept of fitting those highly polished stainless steel or aluminium sill scuff plates to their cars to stop the sills getting scuffed from clumsy-footed drivers and passengers. A scuffed up, scratched sill protector isn’t a good look IMHO and would play havoc with my car OCD .That reminds me of the time I suggested to scaffolders that they should put up scaffolding when putting up scaffolding.