Quote - I absolutely have no clue why anybody would want to "rig" shoes/boots.

Take a shoe, boot, position it over the foot/toe, and save it as a "smart" prop of the foot with inherit bends checked ON.

The shoe/boot will follow all movements of the shin, foot, and toe's.

A "smart" prop will follow all movements one group up and one group down.

 

Same for "smart' propping hair.
Smart prop it to the neck, and it will follow all movement of the head, neck and collars.

The group it is parented to plus; One group up, and one group down.

Why make simple things so complicated?????
KISS never fails. :-)

Now, isn't that funny?  Because I hate, hate, hate prop shoes.  You know why?  Because there's 2.  2 feet.  2 shoes.  2 loads.  2 texture changes.  2 morph the foot in the the correct position.  Double the work.  PITA for a stupid pair of shoes.