Yeah sure, they could go play in a field, and never play in Live Nation venues ( which is basically all of them)

Then they can worry about transit access, food and beverage services, garbage, toilets, safety staff, medical staff, weather, ticket vending( because if they play for free 10x people will come), local accommodation, local permits, stage construction, electrical service, rentals for the above equipment and materials... I'm sure I'm forgetting something.