Dry food is not just carbs, starch and sugar, they have meat in them too, just like wet food, unless you are buying a cheap dollar store brand food or something. Wet food is not just canned meat, it has fillers too, just less. There are dry foods out there that aren't that bad, just make sure you get one that actually has animal protein (like meat and egg) as the first few ingredients. There is a huge difference between cheap cat food like Kit & Kaboodle, and higher end like the Dr Elsey's Rosepud mentioned. I do agree that wet food is better, but I don't think that means all dry food should be banned. If you are feeding a good quality dry food and your cat is healthy, the biggest issue is the lack of water. I think a kibble and wet food diet is perfectly fine if you can't feed all wet food.Yes, unless there is a medical condition that requires it.
Cats are pure carnivores. They only need meat. Dry food is just carbs, starch and sugar.
As mentioned above, dry food leads to urinary blockage, diabetes, kidney issues and being overweight (which increases the risk of heart conditions, etc).
It would be like humans eating nothing but chips, pizza and cookies all day every day. Then wondering why they weigh 300 pounds and have diabetes along with a failing heart.