Fried items are no good compared to cooked vegetables. For making fries we use lot of oil which will have high fatty acids which will give lot of fat to the body. So it is better not to eat fried vegetables or any fried items. Generally vegetables to be boiled then some salt, onion and a little mirchi can be added. These curries are better than same vegetable fried item. I don't see any advantage in consuming fried food than normal food. It is also not advisable to take carbohydrates more. They will not give you much energy but increase your bodyweight.
I don't think making a fry will consume less time. If you want to have a crispy vegetable fry, you have to fry it with more oil and slowly by keeping the flame in sim and go on mixing. In fact making a fry requires personal attention whereas cooking can be done in a cooker, where your personal attention required is very less.