Here's a comparison between two vector programs i use: Flash and Illustrator.
Illustrator is a really picky program where you need to know what you're doing at all times. It knows what it needs, and won't give you any slack.
Flash is like a broken version of Illustrator someone put inside a rusty red wagon so you could roll it down a hill. It's really clunky, and the drawing tools are just slapped on top of there and sometimes stuff falls off the wagon. A really picky program that doesn't know what it wants, and it won't give you any slack.
Why you gotta be like that baby?