If this works for you, stick with it.
For us, dropping food on the ground wasn't ok. We didn't want her learning to feed the dog, or do it other places, and it was something we decided we would address. But you don't have to, if it's working for you! For us to address it, we would ask her to give us the food or put it on the table (in front of her tray) instead. We started slow, but it was a rule in our house, so she got the "warning, reminder of what to do", "warning, reminder of what to do, telling of the consequence", and then "reminder of what she shouldn't do, she should have done, and follow through on consequence". Our consequence, at first, was taking away almost all of her food. Then it was getting her down from the table.
But, I really want to stress, if it's working for you and your family, there's no particular need to change it until it doesn't work.