why are cities trying to attract nomads? They are almost by definition doing location arbitrage, thus paying less in both their country of origin and country of destination.
Additionally while digital nomads may sometimes be ignorant of local culture/tradition and that can be somewhat annoying, they typically don't cause problems when it comes to crime.
Now there are legitimate concerns with respect to housing with things like AirBNB's/under the table housing arrangements and causing the housing prices to increase, but while that is an issue to a local resident it is actually seen as a positive to the city itself when it comes to the economy.