I guess my issue is with their 'inclusion policy.'
They do not list sex as a protected characteristic - only gender identity.
Airbnb does not assign a gender identity to our users. We consider the gender of an individual to be what they identify and/or designate on their user profile.
Elsewhere they make it very clear they take a dim view of guests who behave in a non-inclusive manner
Inclusion – We welcome guests of all backgrounds with authentic hospitality and open minds. Joining Airbnb, as a host or guest, means becoming part of a community of inclusion. Bias, prejudice, racism, and hatred have no place on our platform or in our community.
Basically they are breaking the law because 'gender identity' is NOT a protected characteristic - SEX is.
When you consider the lack of decent regulation I think a policy like this is very very irresponsible.