I doubt he knew much about nikes supply chain back then. Global supply chain and the effects on those outsourced so bony wasnt well understood by the public u tip at least the mid 90s when activism brought it to the forefront. Most people put on their shoes and go about their ways with little thought on where they came from and how they were made.
Investigative reporters on Nike and body shop starting bringing these issues to the public consciousness in the mid late 90s.
Besides, the issue isn’t about Nike as pretty much every single international company engages in some questionable practices, the issue is saying Lebron did something about his charity when there has been multiple instances where lebrons charity appears to be self serving. I didn’t recall Lebron being an outspoken member on black rights until Kaepernick showed that it was a profitable and popular move. The second Lebrons wallet was threatened he turned a blind eye. I don’t see robinson or duncan having those issues.