its called a real keto diet and plenty of people do it
the human body is very capable of growing muscle and strength on many types of diets
you can grow muscle on no carb, you can grow muscle on just fruits, you can grow muscle on just veggies. muscle is gained via training and sleep and has much less to do then what kind of food you eat believe it or not. that is why dudes in prison eating trash get jacked. we just did a podcast about Kali, he got jacked like crazy in prison eating food out of cans and other junk food he bought at the cantene cause all he did in prison was workout and sleep