Agreed; I use elbows or shoulders if possible. Some doors even have a kick plate that can essentially be stepped on!
Sudden thought: Why aren't all doors foot operated? A simple pedal latch would be far more hygenic and easier to operate e.g. with an armload of groceries or when wet than the knobs we have most places. I know I've seen doors with this feature (does a google on "foot pedal door opener"...) It's totally a thing! This should be common!
After touching a door handle.
I usually try to use knuckles to push open doors and try to use a pinky finger to pull them open.