L.S.
I wouldn't classify this under "terrible habits". It's not like she's eating twinkies. ;) Yes, babies like sweet things. Breast milk is very sweet btw, like cantelope even, and this is probably why they favor sweet things. It doesn't matter if you introduce fruits first or not. If they like them they like them. What are you going to do? Everyone has a preference and your dd just happens to like fruit. She's a little fruit bat like my son. Does she like sweet potatoes or carrots? They're full of nutrition too.
I would just try mixing the fruit in with the veggies and see if she'll take them. You can always start cutting back on the amount of fruit you mix in over time. Just keep introducing different foods and don't make a big deal if it if she suddenly doesn't liek things. I can't get my son to eat a sweet potato or apple sauce anymore, but he loves cauliflower. Go figure. There's no reason to go to the jarred foods either. Some of them are full of added salt and other things. Fresh foods, preferable organic too, are great and cheaper too. Check out the book, Super Baby Foods for some ideas. I know there've been a number of baby food making posts that also had some good links.
Frankly, I wouldn't worry about it too much yet. She's only 9 months old. Food the first year is just an experiment and they should be getting the bulk of their nutrition from you or formula. The fact that she's eating fruit is great. I know some kids who never touch the stuff. Don't worry too much.