They have stated their position with the facts for numerous years. In brief it is called self-behavior or self- policing. Being such a huge event (around 30-34 miles counted by members) many more volunteers would be needed.
Allow me to ask you: What is your suggestion as to “how would say 200-300 security guards could even succeed??” I could just picture cops running around all over chasing a golf cart😩. Just tell the golf cart driver to take a stroke, put another ball down and go,