Basically, you answered, “Let the fat lady fend for herself.” 

No, she didn't.  She let the LWs know that she was not their responsibility, which she is not.  They can set any boundaries they want, including doing nothing for that lady.  They didn't agree to be her caretakers when they bought the condo.

There are things that I can't do for myself because of physical injuries I received years ago, and guess what?  I pay other people to do them!  

Are you "that" neighbor who thinks everyone should do her bidding at all times?  I can't see why you took such offense at setting boundaries unless you are.