https://www.nyc.gov/site/specialenforcement/stay-in-the-know...
> Under the NYC Administrative Code, property owners are responsible for ensuring their properties are maintained in a safe and code-compliant manner at all times. Property owners can and will be issued the violation for any illegal short-term rentals at their property -- even if it is conducted by tenants.
Even aside from that, short term rentals can generate more complaints from neighbors and increase wear and tear on the property.