Essentially every tall, lanky fighter has had this exact thread made about them. Especially the tall, lanky fighters who have skinny legs.
I'm mystified that so many people are mystified by differing skeletal structure and muscle development.
In my friend group in college, I had one friend who was 6'4 and fat. Another friend was 5'9 at the most and built like a little tank. By looking at them, you would have thought the tall guy was 80 pounds heavier...except they both weighed in the 240-250 range.