It is not difficult to make a FZ part form scratch... It is though quicker to use other FZ files as templates. i.e. To make a 30-pin part, I will start of with a 30-pin connector, the .fzp and .svg's are already labeled... All EDAs have their pros and cons... I like things about all of them and there are things about all of them that I don't care much for... If I could take the things out of each one of them and put into one EDA, I would have the ideal platform... for me anyway... Of course, we all have different likes and dislikes. The best thing I like about creating parts with a graphics editor is flexibility... I can create a part anyway I like without the restrictions of an EDA built in parts creation tool... In FZ I can create very complex board shapes, I am not aware of another EDA where that can be accomplished. Some EDAs, anything other than a rectangle can be quite challenging.
I never could figure out why people want to compare, Fritzing vs. other EDAs. FZ is not commercial software, it's in a league of it own...
Just think, in nearly all other EDAs to create the DIP 'tiny85 part, you would need to start for scratch, In Fritzing you don't need to... Just take another similar part, do a little editing and you have an instant DIP 'tiny85... just think how much time that saves by not starting for scratch... 