>this is an constant revenue steam in its own right.

Indeed. Amsterdam, for example, is enriched by its diverse trinket shops selling "XXX" poof ball hats and crass t-shirts, and the options for stale pizza, cold waffles and Nutella crepes have never been so plentiful.

He means that locals will be kicked out from their homes - or if they are luckier/smarter - will be living as animals in a zoo.

Mass tourism is dystopic. Living in a touristic area is like living in Disneyland: everything is fake. Did you ever wonder why 'experienced' tourists (we like to call ourselves travellers) don't like touristic areas?

I am saying that using economic activity to gauge positive impact on society is utterly misguided. Consider: we are currently living in an age of robust economic growth and international trade, historic levels of income inequality, and are in the midst of a global mass extinction event with the very real possibility of climate change rendering human civilization in it's current form impossible.