Landing on the outer and taking off on the inner is the standard procedure in busy airports in Asia. And it does make sense to me. If you are on short final on the inner, there is a serious risk of collision if let’s say you are on short final in IMC and at the same time an aircraft on ground is inadvertently crossing the inner runway to join the outer runway for take off.
When you land on the outer, you usually vacate close to the end of the runway, and even if you cross the inner runway by mistake and bad luck, an aircraft is taking off on the inner runway at the same time, he will probably be already airborne by the time he reached your position. You will be in big trouble but most important, probably still alive. xD
Plus using inner runway is more fuel efficient for departing aircraft.