No, you're right: this is a totally inappropriate comparison.

Realistically, you have to use your hands to use the pen or the trolley, so you're inevitably going to pick up germs from them.

In contrast, you're never going to have to touch that bin with anything other than your shoe, which - let's face it - is in contact with far more icky stuff on the ground all the time. So the bin presents absolutely zero issue in comparison to the pen or the trolley.