The issue is an insidious one.
The organisers are making money from the event (sponsorships, merchandise, etc) just like the triathlons or the bike races do.
The question is do they have the right to run their business and have exclusive rights to a public facility.
My take is they can for a limited time if they are paying rent to the council. If not what’s stopping anyone running a business from using public property.
What other people think about me is not my business: Michael J Fox.
just reverse the boat in ! what are they going to do ?