That's a shame your sister is so awful and your parents are enabling her. That's awful. You have no control over it though and can't really change other people. It's healthier to improve your own life that you do have control over. I really hope you start therapy very soon and start working on improving your life etc that's another reason why you'd benefit from having a job, you might afford therapy etc if free one doesnt work out.

As about your sister. I don't believe anyone ever said that your sister can do no wrong. She isn't posting here and I don't think anyone ever mentioned her. I don't know if she needs to clean houses or not. If she posted she is broke and her roof falling out and she is losing her house yet still doesn't work, we'd advice same thing. It's common sense. If I said I was hungry but don't work people would tell me to get a job. if people can afford not working it's fine, but you don't. Can't advice much to your sister. Maybe she can join here