Airbnb is a business. And honestly their behavior is exactly what I would expect from them: dont admit any liability, offer words of consolement.
Their whole business model pretty much is built on the fact that things like this will happen. A lot.
If they truly expected these types of incidents to happen a lot, they would require more information from people (to be able to trace and hold visitors accountable) and have some sort of legalese to ensure that they would never be held liable.