Extra Pesos in my Pocket (while at the Beach)

I'm having trouble understanding this - I can sit on La Ropa - a public beach - in the sand but I can't sit on La Ropa on my own portable beach chair? Or under my own umbrella which protects me from the sun?

Yes. Utter stupidity. And you also can't bring your furry or feathered family members to the beach with you either because a certain influential person once stepped in doggie doo on the beach years ago because she wasn't watching where she was walking and the poor dear contracted an infection.

It's almost as if they don't want people at La Ropa Beach. I keep wondering why the local lodging operators put up with this. I can only guess false promises or false claims were made to some of them by certain influential people.