Really the "problem" of overtourism feels like a stack of pretenses but it does bring to mind an issue of concentration and trying to make a system to help coordinate information on crowding, prices, etc. and lead tourist distribution to become more even which would be a bit more optimal for all involved both for enjoyment of tourists and infastructure return on investment and reliability of industries. It almost sounds like a job for travel agencies except for the obsolescence of their model.