You’re way off the mark dude. You know how you love speed and speed kills etc? Well defending is no different, it’s just not as exciting. The combination of physiology and technique that makes someone run fast is no different to what makes one person a better defender than another, or a better passer of the football or a better fend...no two are the same. To imply that all defenders in the NRL are as good as each other at keeping the middle tight is like expecting everyone to run the 100m sprint to the exact micro second as one another.
Every player in the NRL can run, but some faster than others. Every player in the NRL can tackle, but some better than others.
Jake is a great defender and if you take him out of there and put say a 20 year old with a different body, technique and experience, you’re gonna have a different result.