When i first realized that their primary purpose was to get rid of rats, I had quite the chuckle.
Yeah this is why I dont find it endearing. It's just pointing to unsanitary conditions. It's ubiquitous in NYC which may have dulled some senses but it's not ubiquitous everywhere. Cat's themselves are not very sanitary. Better than rats, sure, but they are a source of toxoplasmosis which is very dangerous to pregnant women for example. Limiting exposure is manageable when keeping as a pet, but its a terrible baselin…
Hyperbole and toxoplasmosis go well together.
In particular: it's a limited time window when an infected feline could transmit toxoplasmosis. It can be dangerous to pregnancies, or immuno-compromised individuals.
Most humans (and other beings) aren't pregnant or immunocompromised, but the drama of the topic gets clicks, so it's a meme of sorts, and it resurfaces every six months or so in the news as if a revelation.