4. Good injury history
With Arsenal suffering on the injury front, the last thing they would want is to sign another injury prone player. If they were to target Kang-in Lee, that would not be the case.
The South Korea international has a good injury record, missing just 16 games throughout his career. Three of those were due to coronavirus so that is quite impressive considering what is expected of modern day footballers.
As his injury history shows, Lee would be a reliable option for the club in terms of fitness. Arteta would be able to call on him when needed without the worry of him being unavailable for selection.