Nah our hands make much better foot substitutes than our feet do hands substitutes. Walking on your hands is way easier than trying to paint a masterpiece or code for hours with your feet!
We're a lot better at standing, walking, and running long distances. Not sure if I'd say objectively worse, just better at different things (but objectively way less cool than peeling a banana and eating it with your feet).
A lot of body parts would be better retractable but that would also be quite the unprecedented mechanism, so durability wouldn't be great. Sadly, it just wouldn't be practical