It would be difficult to explain in a paragraph but in summary tourism is an industry with significant social, environmental and economical impact, on the other hand it is a fragile phenomenon and can be affected by many external factorsAs shown by the COVID-19 pandemic recently. So it is not fully clean, profitable and therefore a substitution to any other sector like oil industry. If managed sustainable, it is a perfect sector as a development tool but counting on it as the only dominant sector would be have negative results. This is my opinion.
If tourism is planned through the system of National Destination Management Organization which is based on tourism profession and tourism degrees, tourism and tourism revenues will be sustainable. (for further knowledge Download the Book from ResearhGate: Ali Erbaş: Tourism Planning Through the System of National Destination Management Organization.