Diet is the only way to get truly ripped unless you do an incredible amount of cardio. I was a competitive cyclist for years and my body fat never dropped until i was putting in 10-12 hours a week, minimum.
On the other hand cardio is essential for good insulin resistance and overall fitness. But that is attainable by 3 days of week doing just 4-6 30 second intervals with 4-4.5 min easy between them. Thats been proven over and over again. Even Dorian does it but has his own extreme version

[urlhttps://www.menshealth.com/uk/fitness/cardio-exercise/a70500378/dorian-yates-hiit-workout/][/url]