Dear Airbnb,
Making IB mandatory works against everything that initially made you great and different from other booking sites.
It takes away the personal touch of letting guests into your home. And it doesn't fit the story of how Airbnb was conceived, and even tends to make a mockery of it.
It's also flawed in that a host can either open themselves up to a lot of risk and invite shady or terrible guests by reducing requirements; Ir by increasing safety and requirements and thereby leaving first-time Airbnb users out in the cold.
Most of MY guests BTW are first-timers.
In this interesting article
inews.co.uk/essentials/lifestyle/travel/use-airbnb-like-expert/
it says:
"... Be wary of instant booking
If your host offers and accepts instant booking requests, it’s possible that the accommodation is a professionally run B&B or small hotel. Although perfectly pleasant, these kind of locations might not offer the unique local home you were looking for.
... "
So please don't force it down hosts' throats. And don't punish them either by favoring IB in searches.
What has happened to fair choice in this world...