Apart from every other answer already given, Venice is existentially threatened by the continuous influx of people causing huge costs to the city while contributing absolutely nothing to the local economy.

I am Italian, I have stayed in my uncle's house in Rialto and loved to experience the little local life that was left at that time (20 years ago, more or less). Nonetheless, I have made the conscious choice not to visit the city ever again until it gets its shit together.

It is in fact cursed to disappear, but to deny young people to experience it because it is turning into a Disneyland for old people is just cruel.