Rambodian
No I'm not cambodian
What does a 200KG deadlift got to do with anything, random...
It's a representation of overall strength, nothing more nothing less. If you can deadlift 200kg, than you can generally do heavier isolation work, it's a given.
Kai is just leaving his ego at the door, when he does an isolation exercise, he fully concentrates on the 'isolation' factor, which denotes how much weight he can lift in the movement.