Picky-eater sister refuses to choose what she wants at a restaurant before her sister does, even though every time she does this, she ends up hating the food: 'I told her that if she didn't tell me what she wanted, I wouldn't buy her anything.'

Maybe the "picky eater" thing is just an excuse to be entitled.

Being a picky eater doesn't mean that you are excused from being entitled. It means that you don't like many foods and have strong preferences when picking what to eat. It never ever means that you can cause a scene because a friend cooked something you don't like or because a restaurant doesn't sell chicken fingers. It just means YOU don't like certain foods, not that it is everyone else's responsibility to find you something you actually like. You are a person who knows how to communicate, so if you are picky with food, then so be it, but that is explicitly a you problem, not anyone else's. Not a server, not your family, not your friends. It's your responsibility to check beforehand whether the restaurant you are going to has any food options you like, or to kindly and nicely express that you don't like any of the options and ask if they can make you something else.

It has become common for some people to make their problems everyone else's problems, like in the story below. We get an entitled sister who, even though she is the one who doesn't like most foods, makes it everyone's problem. She makes a scene over her sister not choosing what she wants to eat so she can copy her, only to refuse to eat it because, of course, she doesn't like it. Why go through all that? Order what you actually want to eat instead of wanting to copy your sister just to hate the food later. CHOOSE, make a decision. It's really not that hard. It would avoid your family a bad time, and it will end up being something she would actually like to eat –I know, shocking!

But well, what can we expect from someone who can't even communicate what she wants to eat or even accept the fact that she can't copy her sister in everything because they don't like the same things? I have no respect for someone who voluntarily wastes food, so I will not defend this girl who is just throwing tantrums and wasting perfectly good food just because she wants to be a copycat.