Not all that long ago, people used to interact and know that some things in life are about you and some aren't. To be nice to someone, you don't need to manually say that it is also a signal for you to feel some form of sinful pleasure thinking that or else no one would ever be able to do anything. These things are not connected. People don't figure out the truth. They just say this because it's easy to give as a defense mechanism for their sly interests and dishonesty in life. Why they do it must be a complicated issue.
If you are wondering how someone who does things emotionally for others gets by, that's a wonder or inquiry/question, not a time to wet yourself / emergency nor criminal justice. It's like "the boy who cried wolf."
Do you wanna wonder why I'm over here? I'm not going to be in the wrong in the future. I'm collecting $200 and passing go, going straight for the Gate. Yes, something bad will happen if I don't listen to the truth.