I think maybe she means that if you go on a date, it's okay to end it when you want to. Like, you don't have to invite the girl over - you can just go to the movie. If you spend some time with someone and have had your fill, you can suggest ending the date, even if they want to continue it.

I agree with you that it doesn't make a lot of sense to invite someone over and then take alone time.

If I meet someone new, I want to put my best foot forward, too. I think maybe her example wasn't a very good one?