Rounded rectangle in Flash

Why does this „Round rectangle“ tool exist in Flash if you can’t draw with it?

[font=Arial][size=3][font=Verdana][size=2]Every time I use it I became frustrated, because of blurred corners and I have to use bitmaps from Fireworks or other programs. You can see attachment if you don’t know what I’m talking about.[/size][/font] [/size][/font]