Unfortunately too many hosts ignore the Airbnb at Work policy and take third party bookings against Airbnb's T&C.
I only accept company bookings through Airbnb at Work ...I would rather lose a potential booking rather than accept a third party booking where the guest has not accepted my house rules and likely hasn't even seen the listing which can lead to a mismatch in expectations.
Finally you are not covered under the Airbnb Guarantee if there is damage to your property or a problem with third party guests @Marlys12