Why do you think I want people to feel sorry for Yamao? Don't really care about that, just stating the truth.
Straw Hats are about to depart, and they about to leave the unwanted baggage behind.
If she later comes and asks to join, that means she is just lucky because she was outside in the rooftop so she can see the Straw Hats departing and she doesn't wanna miss it. She was lucky Luffy wasting his time arguing with Law and Kidd.
Had they left some minutes earlier, or had Yamao was actually inside sleeping, then yep she would get left behind.