You’re right, it wasn’t intended as a blanket statement, since those with type 1 can’t prevent or control it without insulin.
The University of Alberta said that "People with Type 2 diabetes make up 90 per cent of all people living with the disease. And unlike Type 1 diabetes, Type 2 can be prevented. SOURCE
The CDC also said “Yes! You can prevent or delay type 2 diabetes with proven, achievable lifestyle changes—such as losing a small amount of weight and getting more physically active—even if you’re at high risk.” SOURCE
You’re right, it wasn’t intended as a blanket statement, since those with type 1 can’t prevent or control it without insulin.
The University of Alberta said that "People with Type 2 diabetes make up 90 per cent of all people living with the disease. And unlike Type 1 diabetes, Type 2 can be prevented. SOURCE
The CDC also said “Yes! You can prevent or delay type 2 diabetes with proven, achievable lifestyle changes—such as losing a small amount of weight and getting more physically active—even if you’re at high risk.” SOURCE