With that kit at about 15 kilos I suspect he is more a 'stay at home' sort.

Kit size and weight are a trade off between comprehensiveness and portability. A complete kit can cover you for everything short of finding yourself stranded on the moon, But they are often so bulky and heavy you need to carry it in an eighteen wheeler and sort the contents with a forklift.

Odds are when an emergency rolls around that kit will be at home.

On the other hand there are minimalist kits. Generally little more the clothes your wearing, multitool, lighter, a bit of cordage, pen, watch, and a tiny flashlight. That kit is usually on hand. Add a bit of knowledge and an inventive mind and energy and you can often make up for what you don't have.

Everyone has their preferences and reasons for them. Whatever works for you.