Despite countless cuts, slashes, and penetrations of my feet over the years from broken shells, stones, sharp twigs, coral, etc., I have always resisted water shoes. After my last visit to the beach in 2014, Mrs. BD sent me to the store to get some.
They are excellent. You can swim in them, and they protect you from burning-hot sand too. Now I will not go to a beach without them.
Another good use of them is exploring shallow waters for critters and things at low tide. No more slipping on rocks or getting a toe sliced by a sharp oyster shell. They might look a little pussified, but they can keep you functional. I also use them for kayaking.
Lots of them at Amazon.