Also, if my neighbor saw a bunch of strangers in my house when I was away, I would want them to call the police. The problem in that particular case is not that they called the police but that the neighbours were not notified about unexpected strangers staying in the neighborhood.
If someone doesn't want me (a brown male) to stay in their house, I would absolutely like to know and would prefer to have a filter to easily find only the places that accept someone like me. The problem is not discrimination. The problem is anti-discrimination bullshit the company has to go through if they provided such a filter to make lives easy for everyone.