I looked at this video about flat chested girl and it shows the difference between girl with boobs or with- out boobs.

-They don't have to complain about their chest.

-Still looks great in swimsuits 😏

-They can easily take bras off with-out undoing the back.

- Still a girl so it doesn't really matter.

So I like flat chested girls too so I don't see why they complain.