Right now it's about "you were stupid, why did you rent your space out to strangers?". Later on it'll be "why did you try to save $20 and go sleep some place where you're 110% vulnerable?". You don't control the locks, you don't know the neighborhood or even the layout of the house all that well (are there cameras in the room spying on you?).
If Holiday Inn or Marriott had tried to go 'downmarket' by trying to get in the "rent out your space with us - we'll handle the booking logistics", they'd have been eaten alive by the insurance costs of dealing with QA on thousands of rooms/spaces they don't control. They'd have too much name brand recognition and goodwill in their names to lose by leaving customer safety and security to chance. ABNB seems to be coming at this from the other way. What do they have to lose? Investor money? It's a big experiment for them, which they're hoping will pay off, but I think there's a reasons beyond "laziness" or "not getting it" to explain why larger companies well-versed in hospitality/property management have not gone down this road.
Will things still work out for ABNB? They might, but they're taking such a hit on this by not just making some of these situations right, then changing their procedures and policies. Apparently these incidents - as infrequent as they may be - have been occurring for a while. There's probably quite a few more that haven't come forward because they've felt it was their own fault, much like domestic abuse spouses blame themselves. Not really wanting to see ABNB fail, but can't help watching this play out, and I somewhat suspect it'll get worse before it gets better.