The footboard of your bed is called a "spool" bed. Antique and sometimes expensive. It is YOUR bed now. You painted it and you like it. Enjoy.

For better understanding of your grandmother's point of view, look up "Jenny Lind" bed online.

At some time in the future, the current paint can be removed and the headboard and spool footboard can be painted a different color or partially restored to a wood finish. I think it is a good idea to remove paint before re-painting or refinishing a piece with a lot of intricate details. It will make things easier.