You could make the same argument about helping someone change their tire on the side of the road. Or helping a blind person cross the road. Life is full of risks but constantly worrying about them isn’t worth it, especially if it comes at the expense of actually helping someone who is in danger.

If you see someone getting abused or needs help, I think you should do the right thing and try and help them, because everyone helping each other reduces risk for everyone and makes a better society.