One of my aunties friends lives in a "tourist" town in the south west of Ireland. She has lived there since the early 1980's and has seen the town change so much.
You can Google it, Dingle Co Kerry. It is a very old fishing village located in a natural harbour. For generations the local industry was fishing, the boats went out to the Atlantic and came back with all sorts of fish which were then sold in the town market. They would supply the hotels and restaurants in many parts of Ireland.
The town always had tourists as in the 1980's a wild male dolphin lived in the bay. In 1984 the local fishermen started seeing him on a regular basis and he would follow the boats in and out of the harbour.
But in 2014 Irish Tourism created The Wild Atlantic Way promotional campaign. This is a road trip route North / South along the west coast of Ireland.
Dingle is one of the towns on The Wild Atlantic Way road trip route. Around the same time AirBnB became popular. These two things have completely changed Dingle town.
The over tourism in the summer is insane. There are so many tourist cars doing the road trip route that the local authorities have to put in traffic and parking restrictions. This hugely impacts the locals. My aunties friend who is 80 had to buy a
scooter as in the summer she cant park her car outside the Church or grocery store. I visited her in March and I have a standing invitation to visit at any time , except from the end of April to the middle of September, as the town is too crowded to do anything.
She told me that now most of the locals have moved out of the town. Families who for generations had shops, restaurants, pubs and lived above their commercial premises now all live outside the town and commute in for work. The family homes above the commercial premises are now all AirBnB.
In the summer the tourists are in all the AirBnB's above the commercial premises.
The town fish market closed, as the boats are not going out to fish any more. In the summer all the former fishing boats are full of tourists having a tour of the bay. A boat which would have generated fishing revenue for a crew is now just manned by one or two people.
But in the winter there are no tourists.
All the AirBnbs above the commercial premises are empty, which means there are no people living in the town. As a result there is not enough local economy to sustain many shops, pubs and restaurants so they close.
The fishing boats which used to fish all year round are now just moored in the harbour in the winter.
The local people have to find other work during the winter where as before the over tourism, there was a enough of a balance to sustain a year round local economy.
So yes the locals make money from tourists but the local economy has been totally changed and the quality of life for those who live there year round is severely impacted in all sorts of ways.