@Kärt1
It's a really cheap accommodation for NYC, so it can't be expected that it would be top class.
Airbnb is actually quite strict and if a host keeps getting bad reviews and star ratings they will send out a warning, so there is more supervision than it seems.
This host is new and the average star ratings will only show after their 3rd or 4th guest, and that should determine this host's future on this website.
Being unprofessional and rude to potential or present guests has no valid excuse. Again, if that is repeat behaviour, I'm sure the reviews and star-ratings will reflect that.
To your question about strict rules -
As a host it's about finding a way of offering an accommodation at a price lower than in a hotel while not having to give up one's life.
I work from home too and need to make sure from my listing and in pre-messaging that I can't have the kind of guests that will be hanging around most of the day. Believe me, I've had that more a number of times and realised that needed to be controlled more.
So now I'm clearer (but friendly) about it, and my weekday price does also take that into consideration.
And even when starting out with few house rules, they seem to keep getting longer with time, since for some people and things have to be spelled out much more clearly...